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




May 1   Highest average one minute wind velocity, west 55 mph, 1935 

May 3 Latest date that 32 degrees occurred (freeze) 1874 and 1882.  Coldest temperature, 31F, 1882

May 3 Coldest high temperature 40F, 1973 

May 9-10 Most snow in 24 hours, 0.5 inches, 1977, heave snow over the interior 

May 10-11 10 inches or more of snow fell over interior Massachusetts, 1945 

May 11 Lowest pressure 29.09 inches, 1945 

May 15-16 Greatest 24 hour rainfall total, 5.74 inches, 1954 

May 18 Latest in the spring that 70 degrees first occurred, 1995 

May 22 Highest pressure, 30.63 inches, 1936 

May 25 Destructive winds, peak gust 70 mph, 1967 

May 26 Hottest ever May temperature, 97F, 1880 

May 27 Warmest ever low temperature, 74F, 1914 

May 29 Devastating tornado strikes Great Barrington, MA, 1995 

May 31 Boston suburbs experience late freeze, 1961

           94 mph wind gust at Worcester from microburst ties record, 1998