NOAA Eastern Regional Event Data  for Boston
http://www.erh.noaa.gov/er/box/climate/boshistory.html



Aug 2 Warmest temperature, 102F, 1975 

Aug 3 Warmest low temperature, 83F, 1975 (all time) 

Aug 4 Greatest number of days temperature 70 degrees or above, 16 days (Jul 20 to Aug 4), 1994 

Aug 13 Hurricane Connie killed 25 people, 1955 

Aug 15 Tornado struck Malden, 1787 

Aug 17 Longest August heat wave (10-17) 8 days, 1944 

Aug 18-19 Hurricane Diane give record breaking rains.  8.40 inches in 24 hours, greatest ever., 1955.  Devastating floods affect much of New England
 
Aug 19 Hurricane Bob strikes southern New England, 1991 

Aug 20 Tornado struck Charlestown Navy yard, east Boston, 1863 

Aug 22 Middlesex county tornado injured 6 people, 1851 

Aug 25 Lowest temperature, 46F, 1940

Aug 25 Lowest high temperature, 57F, 1914

Aug 25 Great colonial hurricane, 1635 

Aug 26 Lowest pressure, 29.26 inches, 1924

Record 20 consecutive days without measurable rain (7-26), 1995 

Aug 31 Hurricane Carol strikes New England, 1954.  Brings second highest ever 1 minute average wind velocity, 86 mph from the southeast.  Peak gust was 100 mph.

Aug 31 Highest Pressure, 30.48 inches, 1934