DeKalb, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 27° -27° (1985) 63° (1967) 1.54" 9.1"
February 16° 32° -23° (1996) 69° (2000) 1.4" 7.1"
March 26° 44° -13° (2002) 84° (1986) 2.46" 4.6"
April 37° 58° 8° (1982) 92° (1986) 3.52" 1.4"
May 48° 70° 24° (1989) 95° (1985) 4.21" 0.1"
June 58° 80° 34° (1993) 101° (1988) 4.49" 0"
July 63° 84° 43° (1967) 102° (1995) 4.22" 0"
August 61° 81° 39° (1986) 103° (1988) 4.48" 0"
September 51° 74° 27° (1991) 94° (1990) 3.51" 0"
October 40° 62° 13° (1988) 89° (2007) 2.6" 0.2"
November 28° 45° -8° (1976) 76° (2000) 2.82" 2.1"
December 17° 32° -22° (1983) 66° (1970) 2.13" 8.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 22° 38° 6° (1966) 63° (1970) 0.09" NA
Dec 2 22° 37° -3° (1976) 63° (1982) 0.08" NA
Dec 3 21° 37° -3° (1976) 66° (1970) 0.08" NA
Dec 4 21° 36° -4° (1991) 65° (1998) 0.08" NA
Dec 5 21° 36° -4° (1991) 64° (1998) 0.08" NA
Dec 6 20° 36° -7° (1977) 65° (2001) 0.08" NA
Dec 7 20° 35° -7° (1977) 58° (1980) 0.08" NA
Dec 8 20° 35° -2° (2006) 52° (1966) 0.08" NA
Dec 9 19° 34° -9° (1977) 57° (1991) 0.07" NA
Dec 10 19° 34° -12° (1977) 53° (1979) 0.07" NA
Dec 11 19° 34° -15° (1972) 54° (1979) 0.07" NA
Dec 12 18° 33° -2° (2000) 53° (1968) 0.07" NA
Dec 13 18° 33° -8° (2000) 60° (1975) 0.07" NA
Dec 14 17° 33° -9° (1985) 58° (1975) 0.07" NA
Dec 15 17° 32° -8° (1985) 59° (1971) 0.07" NA
Dec 16 17° 32° -2° (1972) 58° (1984) 0.07" NA
Dec 17 16° 32° -8° (1972) 52° (2006) 0.07" NA
Dec 18 16° 31° -11° (1983) 51° (2002) 0.07" NA
Dec 19 16° 31° -17° (1983) 55° (2002) 0.06" NA
Dec 20 15° 31° -9° (1985) 53° (1988) 0.06" NA
Dec 21 15° 31° -5° (2000) 57° (1967) 0.06" NA
Dec 22 15° 30° -12° (2000) 49° (2006) 0.06" NA
Dec 23 15° 30° -14° (1983) 58° (1979) 0.06" NA
Dec 24 14° 30° -22° (1983) 55° (1982) 0.06" NA
Dec 25 14° 29° -13° (1983) 60° (1982) 0.06" NA
Dec 26 14° 29° -13° (1985) 56° (1982) 0.06" NA
Dec 27 13° 29° -6° (1977) 48° (1982) 0.06" NA
Dec 28 13° 29° -3° (1993) 64° (1984) 0.06" NA
Dec 29 13° 28° -8° (1983) 63° (1984) 0.06" NA
Dec 30 12° 28° -9° (1983) 48° (2006) 0.06" NA
Dec 31 12° 28° -14° (1967) 57° (2002) 0.06" NA
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