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
Dec 1 33° 49° 8° (1989) 69° (2001) 0.15" 0.1"
Dec 2 33° 48° 11° (1989) 62° (1968) 0.16" 0.1"
Dec 3 33° 48° 5° (1976) 60° (1986) 0.15" 0.1"
Dec 4 32° 48° 6° (1989) 69° (1998) 0.16" 0.1"
Dec 5 32° 47° 9° (1976) 65° (2001) 0.15" 0.2"
Dec 6 32° 47° 12° (1957) 66° (2001) 0.16" 0.1"
Dec 7 31° 46° 12° (1964) 69° (1998) 0.14" 0.1"
Dec 8 31° 46° 9° (1964) 61° (1966) 0.15" 0.2"
Dec 9 30° 46° 6° (1968) 67° (1991) 0.16" 0.1"
Dec 10 30° 45° 4° (1958) 59° (1987) 0.15" 0.2"
Dec 11 30° 45° 1° (1958) 67° (1971) 0.15" 0.1"
Dec 12 29° 45° 5° (1958) 62° (2008) 0.15" 0.1"
Dec 13 29° 44° 4° (1958) 61° (1983) 0.14" 0.2"
Dec 14 29° 44° 2° (1958) 58° (2001) 0.14" 0.2"
Dec 15 28° 44° 6° (1960) 60° (2001) 0.13" 0.1"
Dec 16 28° 43° 7° (1989) 62° (1971) 0.14" 0.2"
Dec 17 28° 43° 3° (1963) 56° (1984) 0.13" 0.2"
Dec 18 27° 43° 6° (1980) 61° (1984) 0.14" 0.2"
Dec 19 27° 42° 7° (1960) 56° (1990) 0.13" 0.2"
Dec 20 27° 42° 4° (1980) 58° (2002) 0.13" 0.1"
Dec 21 26° 42° 2° (1962) 60° (1973) 0.13" 0.2"
Dec 22 26° 42° -7° (1989) 55° (1990) 0.13" 0.2"
Dec 23 26° 41° 0° (1989) 58° (2004) 0.13" 0.1"
Dec 24 26° 41° 0° (1989) 56° (1990) 0.14" 0.2"
Dec 25 25° 41° -6° (1980) 58° (1964) 0.13" 0.2"
Dec 26 25° 41° -10° (1980) 63° (1982) 0.12" 0.2"
Dec 27 25° 40° 4° (1993) 60° (1973) 0.13" 0.2"
Dec 28 25° 40° 3° (1960) 57° (1982) 0.12" 0.3"
Dec 29 24° 40° 5° (1993) 65° (1984) 0.11" 0.2"
Dec 30 24° 40° -5° (1962) 54° (1990) 0.12" 0.2"
Dec 31 24° 40° -10° (1962) 60° (1965) 0.11" 0.2"
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