Decatur, Michigan
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 31° -21° (1972) 63° (1967) 2.65" NA
February 17° 35° -23° (1978) 72° (2000) 2.03" NA
March 26° 45° -13° (1967) 80° (1986) 2.67" NA
April 36° 58° 6° (1972) 89° (2002) 3.48" NA
May 47° 70° 19° (1966) 92° (1978) 3.72" NA
June 56° 79° 30° (2003) 103° (1953) 3.67" NA
July 60° 83° 38° (2003) 103° (1999) 3.63" NA
August 57° 81° 36° (1967) 100° (1988) 3.9" NA
September 50° 74° 26° (2002) 99° (1953) 4.19" NA
October 39° 62° 13° (2002) 88° (1971) 3.51" NA
November 30° 48° 4° (1959) 77° (1987) 3.45" NA
December 20° 36° -20° (1989) 72° (2001) 3.16" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 25° 41° 7° (1976) 65° (1970) 0.11" NA
Dec 2 25° 40° 2° (1979) 63° (1970) 0.11" NA
Dec 3 24° 40° -11° (1976) 69° (1982) 0.11" NA
Dec 4 24° 40° -4° (2002) 68° (1998) 0.11" NA
Dec 5 24° 39° 5° (1976) 68° (1998) 0.11" NA
Dec 6 23° 39° 5° (1991) 72° (2001) 0.11" NA
Dec 7 23° 39° 7° (1972) 65° (1998) 0.11" NA
Dec 8 23° 38° 8° (1976) 65° (1966) 0.11" NA
Dec 9 22° 38° -2° (2002) 60° (1991) 0.11" NA
Dec 10 22° 38° -5° (1958) 62° (1971) 0.1" NA
Dec 11 22° 37° -3° (1958) 56° (1971) 0.1" NA
Dec 12 21° 37° -5° (1958) 57° (1979) 0.1" NA
Dec 13 21° 37° -10° (1958) 64° (1975) 0.1" NA
Dec 14 21° 36° -3° (1958) 65° (1975) 0.1" NA
Dec 15 20° 36° -9° (1958) 64° (1975) 0.1" NA
Dec 16 20° 36° -6° (1989) 56° (1984) 0.1" NA
Dec 17 20° 35° -6° (1989) 64° (1984) 0.1" NA
Dec 18 20° 35° -1° (2000) 49° (1997) 0.1" NA
Dec 19 19° 35° -2° (1983) 55° (1957) 0.1" NA
Dec 20 19° 35° -4° (1983) 55° (1957) 0.1" NA
Dec 21 19° 34° -5° (1983) 60° (1967) 0.1" NA
Dec 22 19° 34° -8° (2000) 57° (1957) 0.1" NA
Dec 23 18° 34° -20° (1989) 59° (1982) 0.1" NA
Dec 24 18° 34° -17° (1989) 58° (1982) 0.1" NA
Dec 25 18° 33° -2° (2004) 61° (1982) 0.1" NA
Dec 26 18° 33° -9° (1983) 65° (1982) 0.1" NA
Dec 27 17° 33° -8° (2004) 56° (1959) 0.1" NA
Dec 28 17° 33° -9° (2000) 62° (1982) 0.1" NA
Dec 29 17° 33° -9° (2000) 65° (1984) 0.09" NA
Dec 30 17° 32° -11° (1970) 61° (1984) 0.09" NA
Dec 31 16° 32° -7° (1983) 59° (1965) 0.09" NA
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