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



Jul 1 Lowest temperature, 50F, 1988 

Jul 2 Lowest pressure, 29.21 inches, 1932 

Jul 4 Hottest temperature (all time) 104F, 1911 

Jul 6 Lowest temperature, 50F, 1879 

Jul 7 Highest pressure 30.51 inches, 1892 

Jul 10 Severe thunderstorms produce highest 1 hour  precipitation total, 2.10 inches, 1955 

Jul 11 End of longest heat wave ever, 1912. It was 9 consecutive days with 90 degrees or more 

Jul 14 Mercury hits 100F or higher for the 22nd time in history, 1995.  It was the first time since July 21, 1977, when 102 °F was recorded. 

Jul 19 Highest Average one minute wind velocity, northwest 52 mph, 1935 

Jul 21 Warmest low temperature, 81F, 1991 

Jul 26 Lawrence tornado - 11 mile path, 8 killed, 50 injured, 1890 

Jul 1-31 A year with no 90 degree temperatures, 1992