January 2017 Glen Allen

January was easily the cloudiest month ever recorded at this station with only two days that were totally clear.
January had two days with the lowest minimum temperature ever recorded for January at this station 
and yet the month had 16 days above freezing the most consecutive days on record; the previous record was 9 days in January 2013. 
Only 11 days were below freezing during the month; the previous record low was 16 in 2013. 
The average minimum temperature was 1.4 F warmer than the previous highest average minimum temperature for January. 
The 50.1 F highest minimum was the second warmest on record for the month. 
The highest maximum of 72.1 on the 12th was the second highest on record for January and came only 77 hours and 42 minutes 
after the lowest temperature ever recorded in January.
 The average ground temperature was the highest ever recorded for January at 45.1 F.
January’s monthly mean temp. was 41.9 F, a +5.3 F departure and the second warmest on record for the month yet 
there were 3 days that the maximum temperature was 32 F or less. 
 The minimum of 2.5 F on the 8th & 9th were the coldest recorded for January and the second lowest minimum temperature recorded for this station.
 The maximum of 25.9 F on the 9th was the lowest maximum for the month. 
The 38.4 F temperature range on the 31st was the second largest temperature range for January.  
The highest barometric pressure was 30.85 inches on January 9th which was the second highest pressure ever recorded at this station
and the highest since February 28, 2015 when the pressure was 30.87 inches.
The average relative humidity for January was 71.4 percent, the highest on record for January, and a +6.9 percent departure for the month. 
The precipitation for January was 4.63 inches, a departure of +1.40 inches 
and the second greatest for January with 14 days with measurable precipitation which tied the record for the most days in January.
The snowfall for January was 6.6 inches which was a +0.3 inch departure. 
The single day total of 6.5 inches on the 7th was the 3rd greatest on record for January. 
The maximum wind for the month was 33 mph on the 12th. 

				The Richmond International Airport

         The Airport tied one and broke three daily records for January. 
 The 0 F temperature on January 9th was the lowest temperature for the date;
 the previous record was 1 F in 1940 and only 13 Januarys have had a lower temperature.
 The daily mean for the 9th was 12 F and only ten Januarys have had a lower daily mean. 
The 7.0 inches of snow recorded on the 7th was the most snow for the date;
the previous record was 5.5 inches recorded in 1912.
The 4 F temperature range on January 21st was the lowest for the date; the previous record was 5 F in 2010. 
The 3 F temperature range on January 22nd was tied with the lowest temperature for the date set also in 2010
and only ten Januarys have had a lower temperature range.
The mean temperature was 41.6  F with a departure of +3.7 F making it the 26th warmest mean in 120 years.
The average minimum temperature was 33.3  F which was the 17th warmest minimum temperature on record 
and ranked higher than the monthly mean because of all the cloudy damp nights.
 From January 11th to January 27th a period of 17 days the temperature stayed above freezing. 
This has never happened before in the past 120 years of January records for Richmond. 
The next closest record is 14 days from January 1st to January 14th of 2005.
The 4.23 inches of precipitation was a departure of +1.25 inches making it the 30th largest January rainfall amount since 1887. 
The 7.0 inches of snow on the 7th tied for the 25th largest snow in January and January had 5 days with measurable snow on the ground. 
        

					Glen Allen February 2017
February had record warmth in Glen Allen as all temperature parameters were records or above the average. 
February’s mean was 49.2  F, a +9.7 F departure and the driest on record. 
The highest temperature for February was 83.3 F on the 12th and the lowest this month was 18.6 F recorded on the 4th. 
The warmest day was the 8th as the minimum was only 57 F, a new record high minimum for the month, 
and with a maximum of 75.6 F the daily mean was 66.3 F which was also a new record for February. 
This was the warmest day Glen Allen has had in the past 8 years in February.
The average maximum, minimum and mean were all new records at Glen Allen.
There were only 12 days below freezing which was a new record; the previous record was 15 days in 2012.
There were also 10 days with the maximum temperature reaching or surpassing 70 F which double the old record of 5 set in 2011.
On the 18th there was a 42 F temperature range that tied the temperature range record set in 2009. 
The 0.54 inches of rain for the month was the driest February with a negative 2.34-inch departure when compared to the 8-year average.
The snowfall was only a trace from a snow flurry on the 16th, a negative 5.3-inch departure in snowfall. 
The maximum wind gust was 36 mph from the SSW that occurred on Feb. 7th at 1425.  
The wind run of 204.3 miles recorded on the 7th was a new record for February. 
The highest barometer recorded for the month was 30.56 inches, on the 4th and the lowest was 29.42 inches on the 8th.  
The winter was Glen Allen’s warmest and 2nd driest on record. 
December  had the lowest mean temperature and February was the warmest and driest.
 The winter had the least snow since 2012-13 and this was the first February at Glen Allen without measurable snow.

 				Winter Season December, January, February 2016-17	 

 	TEMPERATURE  F 	                                                PRECIPITATION Inches	 SNOWFALL inches
				Ave.			Ave.			Ave.
Month	Max.	Min.	Mean	8Yr.	Dep.	Actual	8 Yr. 	Dep.	Actual	8 Yr.  	Dep.
Dec.	51.2	31.6	41.4	42.8	-1.4	3.11	4.54	-1.43	0	5.2	-5.2
JAN	50.6	33.2	41.9	36.7	5.2	4.63	3.23	1.40	6.6	6.3	0.3
FEB	61.8	36.7	49.2	39.6	9.6	0.54	2.88	-2.34	T	5.3	-5.3
SUM	163.62	101.44	132.53	119.1	13.4	8.28	10.65	-2.37	6.6	16.7	-10.1
AVE.	54.5	33.8	44.2	39.7	4.5	2.76	3.55	-0.79	2.2	5.6	-3.4

					Richmond International Airport
The Richmond Airport had 9 daily records for February. Record High Maximums: 
4 - Feb 07th 74.0 F new record; the old record was 70.0 F in 2008, Feb 08th   75.0 F tied the old record set in 1925, Feb 12th   82.0 F new record;
the old record was 74.0 F in 1999, Feb 23th   75.0 F tied the old record set in 1985 and 1925.
Record High Daily Mean: 2 - Feb 08th 65.0 F new record; the old record was 61.5 F in 1965, Feb 12th  64.0 F new record; the old record was 59 F in 1932.
Max. Record Range 2 -Feb 17th   39 F new record; the old record 38.0 F in 2011, Feb 18th   41 F tied the old record set in 1994 and 1947. 
Record High Mins: 1 - Feb 08th   55 F new record the old record was 52 F in 1965.
 The Airport had a mean temperature of 49.0 F the third warmest February in the past 137 years. 
The Airport’s highest maximum temperature was 82 F only one degree from the 83 F high February record set in Richmond in 1930 and 1932.
The winter seasonal temperature departure was +11.9  F using the thirty-year average. 
It was the warmest winter since 2011-2012 when the average was 44.6 F in 2012 which is now Richmond’s warmest year. 
This February had 10 days of = 70 F that tied the record of ten set in 1976.
The total precipitation was 0.71 inches making it the fifth driest February in the last 146 years. 
The record is 0.48 inches set in 1978. 
The Airport had 7.80 inches of precipitation this winter with a -1.26-inch deficit for the winter season making this the driest winter since 2011-12 when 6.98 inches was recorded.
February had a negative 2.3-inch snowfall departure for the winter and only eight other years of the past 120 years have had no snow in February. 
On the 18th the Airport had a 41 F temperature range, the highest in February since 2004. 
The average temperature range for the month was 25.1 F which was the 7th highest since 1897.

 				Winter Season December, January, February 2016-17	 

 	TEMPERATURE  F 		 	                PRECIPITATION Inches	SNOWFALL inches
				Ave.			Ave.			Ave.
Month	Max.	Min.	Mean	30 Yr. 	Dep.	Actual	30 Yr. 	Dep.	Actual	30 Yr. 	Dep.
Dec.	50.55	31.71	41.13	41.0	0.1	2.80	3.26	-0.46	0.0	2.1	-2.1
JAN	49.90	33.29	41.60	37.9	3.7	4.29	3.04	1.25	7.1	3.9	3.2
FEB	61.57	36.46	49.02	40.9	8.1	0.71	2.76	-2.05	0.0	3.4	-3.4
SUM	162.02	101.46	131.744	119.8	11.9	7.80	9.06	-1.26	7.1	9.4	-2.3
AVE.	54.0	33.8	43.9	39.9	4.0	2.60	3.02	-0.42	2.4	3.1	-0.8

			Glen Allen Summary March 2017

        March was average in temperature and the third driest on record at Glen Allen.
 The monthly mean temperature was 48.8 F, a +0 F departure based on an 8-year average.
  Glen Allen had 14 days that the minimum temperature was =32 F.
 The 80.3 F on the first day of the month was the maximum temperature for March. 
The minimum temperature for March was 20.2 F on the 15th. 
In March of 2012, Glen Allen had 6 days that the maximum temperature was =80 F; this month had only one.  
March had 7 days that the high temperature was =70 F and the average is 6.6 days but March 2012 had 19 days.
 The maximum temperature range for March was 34.7 F on the 24th 
which was the second lowest maximum range on record for the month at this station. 
The average ground temperature at one foot for the month was 49.9 F 
which was a +1.7  departure and in part was caused by the very warm February. 
Glen Allen had a higher average ground temperature for March only in 2012 & 2016.
      The 2.78 inches of precipitation for March was a -1.00-inch departure on the 8-year average.  
The most precipitation in a 24-hour period was 1.13 inches on the 13th and 14th. 
The 1.03 inches of rain on the 31st represented 37% of the month’s precipitation. 
Of the 11days with measurable precipitation, 6 were =0.10 inches. 
The total snowfall was a trace for the month, a departure of -3.6 inches for March.
       The maximum wind gust during March was 46 mph which occurred on the 1st at 1146 hours from the south, the highest on record for March. 
       The cloudiness was just a little less than average for the month. 
       The highest barometer was 30.74 inches on the 5th which is the second highest March barometric pressure for Glen Allen. 
The lowest was only 29.55 inches on the 14th of March 

			Richmond International Airport 

        The mean temperature for March was 49.0 F which was +0.4 F above the thirty year mean temperature. 
This was the 49th warmest March on record. This March had 8 days that the high temperature was greater than or equal to 70 F.  
This March had 13 days that the minimum temperature was =32 F and only 27 years of the 120 years had more. 
The lowest overnight minimum for this month was 22 F on the 16th. 
        The lowest daily temperature range for March was 13 F on the 30th 
which tied for the highest minimum daily temperature range for the month of March in the past 120 years.
        The total precipitation for March was 3.68 inches, 
and since 1897 there have been 59 times that more precipitation occurred in the month of March. 
The average March precipitation is 3.91 inches which was a deficit of 0.23 inches.    
      The total snow for March was a trace which occurred on 4 days and was a departure of -0.6 inches on the 30-year average.
 The last year with only a trace of snow in March was 2011 and the last March with no snow was 2007. 
Only 24 years have had no snow in the month of March in Richmond.

     The Richmond International Airport had three daily records this March.
Mar 01st 81 F new record maximum for the 1st; the previous record was 80 F in 1976 and 1918.
Mar 01st 68.5 F new record mean the for the 1st; the previous record was 66 F in 1976
Mar   31st 1.45 inches of precipitation on the 31st; the previous record was 1.15 inches in 1935.

    
April 2017
			West Henrico Co. - Glen Allen, VA 
April was the warmest on record with a mean temperature of 64.6 F 
and was 5.9 F departure from the average April mean. 
Both the average maximum of 75.3 F and average minimum temperature of 54.0 F were new record highs for April.
The minimum temperature of 73 F on the 29th was a new record high for April. 
April had never seen a +70 F night before this April.
April was the second wettest at Glen Allen with a total of 3.40 inches, 
but a departure of only  0.14 inches based on the average of the past 8-years. 
Measurable precipitation occurred on 12 days in April but the month was a dichotomy. 
The first 15 days were dry with only two days with rain and the second half was wet with ten days of rain. 
The cloud cover was a little above average but the relative humidity was 5.8% above the average
 and was the most humid April on record. 
The temperature range for April was 21.4 F the lowest on record in part because of the humid April.
 April 24th had a 6 F temperature range which tied the low record for the month. 
On the 29th Glen Allen had a dew point of 77 F the highest ever recorded in April.
The daily mean temperature for the 29th was 81 F which was a new record for Glen Allen 
and the first time the station had a heat index over 100 F in April.
This April had thirteen 80 degree days; the previous record was only nine. 
April 28th had only a 6.4 F temperature range which tied for the lowest range on record for April.
The lowest minimum temperature was 31.6 F recorded on the 8th and only 3 days were less than =40 F  for April; 
the previous record was 5 days. 
The maximum wind gust was 33 mph from the SSW that occurred on the 6th at 1755. 



			Richmond International Airport
April was the warmest month in the past 120 years with a mean temperature of 64.2 F 
and was 6 F above the average April mean; the previous record was 63.2 recorded in 1994. 
The average maximum of 75.3 F was the 7th warmest on record 
and minimum temperature of 53.2 F set a new record high minimum average for April. 
The minimum temperature of 73 F on the 29th was a new record high minimum for April.
April had never seen a +70 F night before this April; the previous record was 69 F in 1922.
The 29th had a daily mean of 80.5 F; the only warmer April day in the past 120 years was April 27,1915.
The Airport had 3 daily records for the highest minimum temperature.
28th the record high minimum was 66 F; the previous record was 65 in1935,
29th the record high minimum was 73 F; the previous record was 67 in1956,
30th the record high minimum was 70 F; the previous record was 63 in 2014, 1991, 1915.  
The daily temperature range was 22.1 F and only 35 Aprils have had a lower range.
The April precipitation total was only 2.28 inches, a departure of -0.99 inches, 
and was 1.12 inches less than Glen Allen’s April precipitation total. 
This was the 38th driest April since 1887. 
The greatest daily precipitation was 0.39 inches on the 22nd ; 
only four Aprils have recorded less 1950, 1963, 1985, 1991.
The Airport reported no snow in April. 
The last measurable snow for Richmond in April was one inch on April 7, 2007.
 

	2017   Spring in West Henrico Co. - Springfield Park, Glen Allen, VA
		TEMPERATURE		PRECIPITATION		SNOW
Months	 	 	 	8 Yr.	 	 	8 Yr.	 	 	8 Yr.	 
Spring	Max.	Min.	Mean	Ave.	Depart.	Total	Ave.	Depart.	Total	Ave.	Depart.
Mar.	59.7	37.9	48.8	48.8	0.0	2.78	3.78	-1.00	T	3.6	-3.6
Apr.	75.3	54.0	64.6	58.7	5.9	3.40	3.26	0.14	0.0	0.0	0.0
May	76.2	55.9	66.1	68.3	-2.2	5.83	4.56	1.28	0.0	0.0	0.0
SUM	211.3	147.9	179.6	175.8	3.8	12.01	11.60	0.41	0.0	3.6	-3.6
AVE.	70.4	49.3	59.9	58.6	1.3	4.00	3.87	0.14	0.0	1.2	-1.2

			Richmond International Airport
The Airport’s mean temperature of 65.9 F was a -0.5 departure, and the 58th coolest May since 1897. 
The average temperature range for May was only 20.2 F and only 12 years in 120 years were lower. 
The Airport’s precipitation for May was 7.57 inches with a +3.79 inch departure. 
The wettest May was last year with 9.79 inches. The Airport had 15 days with measurable 
precipitation in May and only 11 Mays have had more days with rain. 
The Airport had three days with = 1 inch of rain; the record is five set in 1972. 

The Richmond International Airport had 4 daily records that either tied or were broken.

Record Low Maximums  
May 12th    54 F tied the old record set in 2008.
Record High Minimums  
May 01st    69 F tied the old record set in 1947.
High Daily Temperature Range
May 14th    37 F tied the old record set in 1941 and 1940.
Low Daily Temperature Range
May 12th    4 F new record - the old record was 5 F in 1960. 
Since 1897 only 2003 and 1917 have had a lower temperature range.

			2017  Spring   Richmond   International   Airport
 			TEMPERATURE		PRECIPITATION		SNOWFALL INCHES
Month	Max.	Min.	Mean	30 year	Dep.	Actual	30 year	Dep.	Actual	30 year	Dep.
Mar.	60.1	37.9	49.0	48.6	0.4	3.68	4.04	-0.36	Trace	0.6	-0.6
Apr.	75.3	53.2	64.2	58.2	6.0	2.28	3.27	-0.99	0.0	0.1	-0.1
May	76.0	55.8	65.9	66.4	-0.5	7.57	3.78	3.79	0.0	0	0.0
SUM	211.3	146.9	179.1	173.2	5.9	13.53	11.09	2.44	Trace	0.7	-0.7
AVE.	70.4	49.0	59.7	57.7	2.0	4.51	3.70	0.81	0.0	0.2	-0.2

This was a strange spring as March had no measurable snow and April was the warmest in 137 years arousing spring plants.
 May was the sixth wettest May since 1887 and May was the ninth wettest since 1872.
 Though wet, the cool nights and cloudy days of the first half of May, inhibited the growth of warm season vegetables, 
not a good season for gardeners. Many of the bean seeds rotted and had to be reseeded in the second half of May. 
The second half of May was above average balancing the mean for May close to average.

 					Glen Allen

       June had a large difference in precipitation at the Glen Allen station and the Richmond International Airport.
The 4.77 inches monthly precipitation at Glen Allen was a positive departure of 0.70 inches 
and the Airport had a negative 1.60 inches departure.  
Glen Allen had 6 days in June with measurable precipitation and a dry period of 13 days 
with only 0.53 inches of rain from May 29th to June 13th.   
The Glen Allen station had 2.44 inches more precipitation this month than the Richmond International Airport. 
Thunderstorms have caused varying rainfall amounts over the region. Thunder was heard on three days during June. 
The thunderstorm of June 16th was not a severe storm but gave the Glen Allen station 1.93 inches of precipitation 
the most since October 8, 2016 when tropical storm Matthew gave 2.81 inches of rain. 
This was also the second greatest rainfall in a day for June. 
The maximum wind for June here was 38 mph on the 19th at 3:56 PM in the thunderstorm. 
The mean temperature for June was 75.2 F with a negative 1.1 F departure. 
The highest temperature for the month was 93 F on the 12th and only 5 days had a maximum temperature of =90 F
which is the 2nd least on record. 
The lowest temperature was 52.7 F on the 9th. The highest dew point temperature for June was 79.0 F on the 13th.
It is interesting that the largest rain of the month occurred on the same date as the severe thunderstorm of June 16, 2016 
and that the minimum temperature for the month on the 9th occurred on the same date as the June minimum of 2016. 
The first 15 days of June 2016 was also dry with only 0.42 inches of precipitation.


				Richmond International Airport

       The Richmond International Airport had 2.33 inches of precipitation for June which was -1.60 inches departure 
and only 29 years in the past 130 years have been drier. 
This was the driest June since 2010 when only 0.82 inches was recorded and had only 6 days with precipitation. 
The Airport’s June total precipitation was much less largely because the Airport had 1.49 inches less rain on 
the 16th and 17th than the Glen Allen station. 
The Richmond International Airport had no daily records for June.   
The Richmond International Airport had an average minimum temperature of 64.6 which was a departure of +0.1 F.  
The average maximum temperature of 85.6 which was a departure of -0.5 F. 
The Airport’s mean temperature for June of 75.1 F was a -0.2 F departure and the 82nd coolest since 1897. 
The highest daily maximum temperature was 94 F on the 11th and the lowest minimum temperature was 53 F which occurred on June 9th.   

					The Glen Allen Station
July had near average precipitation for the month but 74% of the month’s precipitation occurred on the 5th and 29th. 
The 4.11 inches monthly precipitation was a departure of only -0.23 inches.  
But, there were 17 days with no measurable precipitation from the 6th to the 22nd, which ties the maximum number of consecutive days
 at this station with no measurable precipitation; the previous record was a 17-day April period a much cooler month. 
The mean temperature of 81.1 F was +1.2 F departure from the nine-year average and the 5th hottest July on record. 
The record is 82.7 F in 2012. This July had 21 days with temperatures of =90 F; the July record is 22 days. 
Glen Allen had only two days that the maximum temperature wasn’t 86 F or higher for the month. 
It is interesting that Richmond has had six of the ten hottest Julys since 2005 in the past 120-years counting 2017 and uses a 30-year average. 
Thus, Glen Allen’s average mean for July is +0.6 F higher than the Richmond International Airport as Glen Allen records have 
2010-the hottest July, 2012-2nd hottest, 2011-4th hottest and 2017-10th hottest.
The high temperature range for July was 29 F on the 31st and the lowest monthly daily temperature range was 9 F on the 29th. 
The 9-year lowest daily temperature range record for July is 8 F in 2012 and 2016. 
The highest dew point of 77.5 F on the 24th was the second lowest in the past 9-years.
Rainfall amounts varied greatly over the area. Glen Allen had 4.11 inches and the Richmond International Airport had only 2.25 inches. 
Glen Allen had only 6 days with measurable precipitation in July which was the least ever recorded for the month. 
The maximum precipitation recorded in a calendar day and a 24-hour period was 1.76 inches on the 5th which was the second greatest on record for July.  
The average relative humidity of 67.7 percent was the 4th lowest on record for July. 
The 17-day period with only a trace of precipitation left a deficit of moisture for evaporation &
 transpiration & reduced relative humidity for the month.

					Richmond International Airport
The Richmond International Airport’s average mean temperature was 81.3 F 
which made July tied with 1987 for the 10th warmest since 1880 with a departure of +2.0 F. 
This July had 22 days with temperatures of =90 F; the July record is 26 days in 1993. 
The maximum daily temperature range for the month was 28 F on the 31st and the minimum was 7 F 
on the 29th a record for the date and only 27 Julys have had a lower daily range.  
The highest monthly temperature was 101 F on the 13th; only 13 Julys have had a higher reading since 1897. 
It is also surprising that the maximum temperature was only 73 F on July 29th. 
There are also only 28 Julys since 1897 that have had a lower monthly temperature. 
The Airport had only 2.25 inches of precipitation which was a departure of -2.26 inches 
with 8 days of measurable precipitation.  
Only 18 years in the past 130 years have been drier and the Airport had 1.86 inches less than the Glen Allen Station.
The Richmond International Airport had 4 daily records set in July.
Jul 12th 98 F tied the old record high daily maximum temperature set in 1986, 1937, 1936 and 1925.
Jul 13th 77 F new record high daily minimum temperature - the old record 76 F in 2006, 1992, 1909
Jul 13th 88.0 F new record daily high mean temperature - the old record 86.5 F set in 1986
Jul 29th  7 F tied the record lowest daily temperature range set in 1991 and 1960.
 

 
					August 2017 Glen Allen

The monthly mean temperature for August was 76.5 F, a -1.1 F mean temperature departure based on a nine-year average. 
The maximum temperature for August was 94 F on the 18th.  The lowest minimum was 57.9 F on the 28th. 
The highest minimum temperature of 74.8 on August 18th was the second lowest on record for August.
 There were only 10 nights the temperature was =70 F; last year it was 22 nights. 
The average relative humidity of 72.9% had a departure of only 0.9%.
 The lowest relative humidity was 39% on the 5th and 6th.
 The highest temperature range was 29 F on the 6th and the lowest was 6 F on the 29th. 
The maximum temperature on the 29th of 68.3 F is the second lowest August maximum temperature in the past 9 years; 
only August 18, 2013 was lower at 67.9 F. 
The 29th also had the lowest daily mean of 65.5 F or the coolest day of the month.
The maximum wind gust was 25 mph occurring on both the 7th and 29th. 
Thunder was only heard 2 days in August which is the least on record for the month.
The 3.18 inches of rain for August was a negative 0.94-inch departure based on a nine-year average and
 the third driest August on record. 
The most rainfall in a calendar day was only 0.71 inches on the 29th which is the second lowest on record for August. 
The most rainfall in 24 hours was only 0.86 inches, on the 7th and 8th, 
which is the lowest amount for August in the past 9 years and the month had 11 days with measurable precipitation.

       Season Notes - This was Glen Allen‘s coolest summer since 2015 which was 0.5 F cooler than this summer. 
The precipitation amounts are very different at Glen Allen and the Airport with 
two of the three months being the opposite on surplus and deficit. 
The summer of 2017 had 12.06 inches precipitation which is very near the average but was 
the wettest summer since 2013 which was Glen Allen‘s wettest summer in the past 9 years.  ( 9-year averages )


 	 	2017	Summer in West Henrico Co. - Glen Allen, VA  
	 
9Yr-Ave 2017	2017	9YrAve.	2017	2017	9YrAve.	2017	2017	2017
Summer 	Mean	Mean	Temp.	Prec.	Total	Prec.	RH	RH	RH
Season	Temp.	Temp.	Dep. 	 F	Ave.	Precip	Dep. 	Ave.	Dep. 
June	76.25	75.2	-1.1	4.07	4.77	0.70	70.4	70.9	0.5
July	79.89	81.1	1.2	4.34	4.11	-0.23	69.8	67.7	-2.1
Aug.	77.61	76.5	-1.1	4.12	3.18	-0.94	72.0	72.9	0.9
SUM	233.75	232.8	-1.0	12.54	12.06	-0.48	212.3	211.6	-0.7
AVE.	77.9	77.6	-0.3	4.18	4.02	-0.16	70.8	70.5	-0.2

					Richmond International Airport
The Richmond International Airport had an August mean temperature of 76.5 F and was the 65th coolest August since 1897.
The Airport’s highest daily minimum was 74 F on the 18th and 19th.  The highest maximum was 93 F on the 3rd. 
The Airport had two daily records that were ties. The August 19th high minimum of 74 F tied records in 2009, 1901 and 1900. 
The temperature range of 6 F on the 29th tied with 1935 for the lowest temperature range for the date. Also, 
the 29th had the cool maximum of 69 F ; only 17 years have had an August with a lower maximum temperature.
The Richmond International Airport had 5.94 inches of rain for the 46th wettest August in the past 145 years. 
The Airport reported only 4 days with measurable rain; no August in the past 143 years has reported fewer days of rain.

       Season Notes - The summer averaged only 0.8 F warmer than average because of the hot July that 
tied for the tenth hottest July but was still the coolest since 2014. 
The precipitation was below average because of the dry July and August making the summer the driest since 2014.   
( 30-year averages )

			2017	Richmond International Airport
30 Yr				30 Yr
Ave. 	2017	2017	2017	Ave. 	2017	2017
Summer 	Mean	Mean	Temp.	Prec.	Tot.	Prec.
Season	Temp.	Temp.	Dep. F	Ave.	Prec.	Dep. 
June	75.3	75.1	-0.2	3.93	2.33	-1.60
July	79.3	81.3	2.0	4.51	2.25	-2.26
Aug.	77.5	76.5	-1.0	4.66	5.94	1.28
SUM	232.10	233.9	0.84	13.10	10.52	-2.59
AVE.	77.4	77.6	0.28	4.37	3.51	-0.86

						Glen Allen
   
September was a temperature dichotomy with below average temperatures until the 13th and 
then above average temperatures for most of the rest of September. 
The monthly mean temperature was 70.5 F a -1.1 F departure when compared to the 9-year average.  
The lowest minimum temperature for the month was 48 F on the 10th. 
The month’s maximum temperature of only 89.5 F on September 24th was -1.8 F below the 9-year average monthly maximum. 
On the 22nd the highest heat index for the month was only 99.2 the third lowest for September. 
The average ground temperature at a foot averaged 71.9 F a new minimum record for September. 
There was only 1 night in the month that the minimum didn’t drop below 70 F.
The 2.75 inches of precipitation for September was a negative 1.26 inch departure. 
The precipitation was also a dichotomy with 2.74 inches in the first 14 days and only 0.01 inches in the last 16 days. 
September ended in a continuing very dry period of 12 days without any rain that will continue into October. 
September was the 4th clearest in the past 9 years and the average temperature range was
 20.2 F degrees the fourth highest on record. 
The low barometric pressure was 29.77 inches which was the second highest minimum pressure 
and the maximum pressure was 30.41 inches which was a new record for September. 

				Richmond International Airport

      The Richmond Airport had a mean temperature of 71.1 degrees which was a departure of +0.5 degrees. 
The September mean temperature has been warmer 48 years since 1897.   
The average minimum temperature was 60.8 F which was a departure of +0.7 F. The lowest minimum temperature for September was 51 F. 
The Airport set two daily records. The high minimum temperature during the month was 72 F on the 27th; 
the previous record for the date was 71 F in both 1920 and 1900. 
The daily mean temperature for the 2nd was 62 F making this the coolest September 2nd since 1897; the previous record was 62.5 F in 1915.
The Richmond International Airport recorded only 1.48 inches of precipitation giving a departure of 
-2.65 inches or the 28th driest September in the past 130 years. 
The Airport had only 7 days with measurable precipitation which was the least in September since 2013. 
This is also the driest September since 2014 when only 1.35 inches of precipitation occurred. 
The hurricane season has been very active this year with three major hurricanes of the season so far Harvey, Irma, and Maria. 
The Richmond area has been very fortunate not to be affected by any of these strong storms.
  

					Glen Allen Climate Summary

Glen Allen had the warmest October on record and from the 6th to the 16th it was cloudy and wet with low temperature ranges. 
The last half of the month was sunny with large temperature ranges and heavy dews but no killing frost. 
The monthly mean temperature was 63.5 F +3.8 F departure when compared to the nine-year average. 
The month’s maximum average temperature of 74.7 F and minimum average of 52.4 F were both the highest on record for October. 
The lowest minimum temperature was 37.5 F on the 18th which tied for the highest minimum temperature on record for October. 
October the 8th to the 10th was like July as the low temperature of 74 F was recorded on the 8th and 9th both were 
record high minimums for the month of October.
On the 10th the dew point was an unbelievable 77.5 F at 1529 also a new record for Glen Allen.
The average dew point of 56.1 F for the month was also a record high for October. 
The month also had the highest average ground temperature at one foot on record.
The 5.82 inches of precipitation made October the wettest on record and on the 11th, 24th, and 29th had more than one inch. 
Three days in October with more than one inch of rain is a new record and there were ten days with measurable precipitation. 
The maximum wind gust of 27 mph on the 9th was the lowest on record for the maximum wind gust for October. 
The lowest pressure of 29.24 inches was the second lowest on record. The record was set by Sandy in 2012 with a low of 28.96 inches.
 The cloudy days of the first part of the month and clear days of the second half of the month many the average cloudiness for October near average.

					Richmond International Airport

Eight records were found in the Richmond records for October. The 8th and 10th were the warmest October days on record for the date. 
The daily mean on the 8th was 79.0 F; the previous record, since 1897, was 78.5 F in 2007. The daily mean on the 10th was 79.0 F; 
the previous record, since 1897, was 77.5 F in 1939. The 4 F temperature range on the 14th tied the record, 
since 1897, for the date with 1914 and 1912. 
The 1.91 inches of rain on the 11th was a new rainfall record, since 1872, for the date; the previous record was 1.51 inches in 1902. 
There were also four new record high minimum temperatures set on the 8th, 9th, 10th, and 11th.
The October mean temperature was 63.6 F which was the 10th warmest October since 1880 and was a +3.9  departure from average. 
Note there is a tie for 8th place of 64.27 F for the mean temperatures between 1884 and 1887. 
The high minimum temperature of 73 F on the 8th and 9th was only 1 degree from tying 
the record highest minimum ever recorded for Richmond since 1880 set in 2012 and 1986.
The 4.95 inches of rain for October made it the 25th wettest October since 1897 and a departure of 2.07 inches for the month.   
 

					Glen Allen November 2017
This November was the second driest on record (records since 2008) as the monthly precipitation was 1.50 inches, 
a negative 2.32 inches departure when compared with Glen Allen’s nine-year average. 
Precipitation occurred on 10 days in November and the month was the fifth clearest on record. 
The maximum temperature for November was 82 F on the 3rd which was the 2nd warmest record monthly maximum. 
This was also the second temperature above 80 F recorded for November. 
The month had 4 days with the maximum temperature of = 75 F. The lowest minimum was 24.5 F recorded on the 11th.  
There were 11 days that the minimum temperature was less than or equal to 32 F which was 2.6 F above the average.  
The clear days of the last half of November gave large daily temperature ranges and the average temperature range for the month was 22.9 F. 
The maximum barometer reading for the month was 30.65 inches occurring on the 11th which was the 3rd highest on record. 
The maximum wind gust was only 29 mph on the 19th.


		2017  AUTUMN   SEASON    SEP,  OCT,  NOV
Winter	Mean	9-YR	Temp.	Total	9-YR	Prec.	Total	9-YR	Snow
Season	Temp.	 Ave.	Dep.	Prec.	 Ave.	Dep.	Snow	 Ave.	Dep.
Months	  F	  F 	  F	Inches	Inches	Inches	Inches	Inches	Inches
SEP.	70.5	71.6	-1.1	2.75	4.01	-1.26	0.0	0.0	0.0
OCT.	63.5	59.7	3.8	5.82	3.50	2.32	0.0	0.0	0.0
NOV.	48.7	49.2	-0.4	1.50	3.82	-2.32	0.0	0.0	0.0
SUM	182.8	180.5	2.2	10.07	11.33	-1.26	0.0	0.0	0.0
AVE.	60.9	60.2	0.7	3.36	3.78	-0.42	0.0	0.0	0.0

Glen Allen fall season was +0.7 F warmer than normal based on a 9-year average.
Glen Allen 2017 average autumn temp. was 60.9 F the 5th warmest autumn on record.
Glen Allen had the 4th driest autumn with 10.07 inches of precipitation and a departure of -1.26 inches.
The October precipitation was the wettest on record but both Sept and Nov were more than one inch below average.

					Richmond International Airport
The average November maximum temperature was 49.1 which was the 62nd coolest since 1897 
and a departure from normal of -1.4 F. 
The 1.43 inches of precipitation recorded this month was the 37th driest Nov. of the past 130 years. 
This was a negative 1.81-inch departure from normal with a total of 10 days with measurable precipitation. 
The Airport’s greatest daily rainfall was 0.65 inches on the 13th. 
The 82 F on the 3rd was only one degree below the record for the date set in 2016. 
Only 9 years since 1897 have had a higher November monthly temperature. 
The highest on record is 86 F in 1993, 1974, and 1950. 
The Airport had tied only one daily record for the month. 
November 25th with a 40 F daily temperature range tied with November 1950. 
The average temperature range this November was 22.6 F. 
No snow occurred during the fall which has occurred 63 times in the past 120 years. 
There are 37 years with a trace and only 21 years with measurable snowfalls.


		2017  AUTUMN   SEASON    SEP,  OCT,  NOV
Winter	Mean	30 -YR	Temp.	Total	30 -YR	Prec.	Total	30 -YR	Snow
Season	Temp.	 Ave.	Dep.	Prec.	 Ave.	Dep.	Snow	 Ave.	Dep.
Months	  F	  F 	  F	Inches	Inches	Inches	Inches	Inches	Inches
SEP.	71.1	70.6	0.5	1.48	4.13	-2.65	0.0	0.0	0.0
OCT.	63.6	59.7	3.9	4.95	2.98	1.97	0.0	0.0	0.0
NOV.	49.1	50.5	-1.4	1.43	3.24	-1.81	0.0	0.2	-0.2
SUM	183.8	180.8	3.0	7.86	10.35	-2.49	0.0	0.2	-0.2
AVE.	61.3	60.3	1.0	2.62	3.45	-0.83	0.0	0.1	-0.1


The Richmond International Airport fall season was +1.0 F warmer than normal based on a 30yr. average.                      
The precipitation deficit for the fall season was -2.49 inches based on a 30-year average.

					Glen Allen, Virginia
        December was the third coldest and the driest on record at Glen Allen. 
The monthly mean temperature was 39.2 F, a -3.6 F departure from the nine-year average. 
December had its highest maximum of 67.8 F on December 23rd but had only 3 days of =65 F. 
On 20 days, the minimum reached freezing or below which was third greatest in December in the past 9-years. 
The lowest temperature was 13.7 F occurring on the 28th which was 
the 2nd lowest minimum ever recorded at Glen Allen in December. 
The lowest dew point occurred on December 31st and was 0.7 F which was the 4th lowest on record. 
Temperatures were warm to the 7th then below average to the 18th then warm to the 23rd then colder again. 
The highest barometric pressure for December was 30.70 inches recorded on the 28th 
which tied for the 3rd highest barometric pressure. 
December had a total of 5.3 inches of snow, the 3rd greatest in the past 9 years.  
The 5.2 inches of snow on the 8th and 9th was also the most to fall so early in December.  
The total snow for 2017 was 11.9 inches which was a -5.2 inch deficit. 
The precipitation total for the month was only 0.99 inches the least on record for December 
giving a -3.55 inch departure based on a nine-year average. 
There were only 6 days with measurable precipitation in December the least on record and half of these were snow days. 
The total precipitation for the year was 40.30 inches which was a 5.24 inch deficit. 
Only 2012 was drier with 34.12 inches. 
The average relative humidity of 68% was the 3rd lowest on record for December.   
The month had a wind run of 2083.4 miles which was a new record for December 
and the windiest day was the 23rd with a wind run of 170 miles.


				Richmond International Airport
The mean temperature for the Richmond International Airport was 39.6 F which was a -1.4 degree departure 
and the 50th coldest in the past 120 years. 
The minimum temperature of 14 F on the 28th was the lowest minimum in December since 2004 when 13 F was recorded. 
The lowest maximum temperature of 27 F for December which occurred on the 28th and 31st was also the lowest since 2004.  
December had 3.1 inches of frozen precipitation which was one inch above the average. 
This was the first measurable snow in December since 2010. 
The 1.05 inches of precipitation for December made it the 11th driest December in the past 130 years
with a -2.21 inch departure.  
The total precipitation for 2017 was 37.96 inches which was a 5.64 inch deficit for the year. 
The Airport also set 2 daily records for the date.

1.December 9th with a maximum of 33  F and a minimum of 32 gave a 1 F temperature range. 
This has occurred only once before in December in 1972 on the 23rd in the past 120 years.

2.The low maximum temperature on the 28th was 27 F, the lowest maximum for the date; 
the previous record was 28 F in 1924.