Groton, Connecticut
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° 38° -14° (1961) 65° (1967) 3.78" 6"
February 25° 41° -12° (1965) 67° (1976) 3.66" 7.5"
March 32° 48° 0° (1967) 78° (1998) 5.07" 3"
April 41° 58° 14° (1982) 88° (2002) 4.54" 0.8"
May 50° 67° 30° (1966) 91° (1987) 3.65" 0"
June 59° 76° 38° (1967) 95° (1991) 4.08" 0"
July 65° 81° 47° (1988) 101° (1991) 3.63" 0"
August 65° 80° 41° (1965) 99° (1975) 4.29" 0"
September 57° 74° 29° (1957) 93° (1983) 4.16" 0"
October 46° 63° 22° (1966) 83° (1959) 4.15" 0"
November 38° 54° 8° (1989) 75° (1982) 4.54" 0.8"
December 28° 44° -10° (1980) 69° (2001) 4.28" 5.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 45° 63° 33° (1961) 80° (1957) 0.11" 0"
May 2 46° 63° 33° (1964) 72° (1958) 0.11" 0"
May 3 46° 63° 30° (1966) 74° (2010) 0.11" 0"
May 4 46° 63° 30° (1966) 83° (1965) 0.11" 0"
May 5 47° 64° 33° (1961) 79° (2000) 0.11" 0"
May 6 47° 64° 33° (1969) 79° (2010) 0.11" 0"
May 7 47° 64° 31° (1967) 83° (2000) 0.12" 0"
May 8 47° 65° 32° (1974) 85° (2000) 0.1" 0"
May 9 48° 65° 33° (1977) 82° (1957) 0.11" 0"
May 10 48° 65° 34° (1966) 91° (1979) 0.11" 0"
May 11 48° 66° 31° (1966) 83° (1993) 0.11" 0"
May 12 48° 66° 34° (1972) 86° (1991) 0.11" 0"
May 13 49° 66° 34° (1963) 77° (2004) 0.1" 0"
May 14 49° 66° 34° (1996) 79° (1985) 0.1" 0"
May 15 49° 67° 38° (1969) 82° (1976) 0.1" 0"
May 16 49° 67° 39° (1959) 80° (1991) 0.11" 0"
May 17 50° 67° 35° (1959) 87° (1974) 0.1" 0"
May 18 50° 68° 36° (1983) 87° (1977) 0.11" 0"
May 19 50° 68° 37° (1981) 82° (1998) 0.12" 0"
May 20 51° 68° 38° (2002) 89° (1996) 0.11" 0"
May 21 51° 68° 38° (1964) 86° (1996) 0.12" 0"
May 22 51° 69° 37° (1990) 87° (1992) 0.13" 0"
May 23 51° 69° 39° (1967) 87° (1964) 0.13" 0"
May 24 52° 69° 37° (1963) 85° (1975) 0.14" 0"
May 25 52° 70° 38° (1963) 89° (1991) 0.13" 0"
May 26 52° 70° 36° (1972) 89° (2010) 0.14" 0"
May 27 53° 70° 36° (1972) 82° (1977) 0.13" 0"
May 28 53° 70° 39° (1990) 88° (1991) 0.14" 0"
May 29 53° 71° 38° (1962) 87° (1969) 0.13" 0"
May 30 54° 71° 38° (1970) 91° (1987) 0.15" 0"
May 31 54° 71° 33° (1961) 87° (1987) 0.14" 0"
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