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
Sep 1 57° 78° 42° (1967) 93° (2000) 0.14" NA
Sep 2 56° 78° 43° (1976) 93° (2000) 0.14" NA
Sep 3 56° 78° 41° (1974) 92° (1973) 0.13" NA
Sep 4 56° 78° 41° (1974) 91° (1990) 0.13" NA
Sep 5 55° 77° 41° (1974) 91° (1990) 0.13" NA
Sep 6 55° 77° 36° (1988) 94° (1990) 0.13" NA
Sep 7 54° 77° 38° (1988) 94° (1985) 0.13" NA
Sep 8 54° 77° 39° (1986) 94° (1978) 0.13" NA
Sep 9 54° 76° 40° (1986) 94° (1978) 0.13" NA
Sep 10 53° 76° 42° (1967) 93° (1978) 0.12" NA
Sep 11 53° 76° 39° (1967) 92° (1978) 0.12" NA
Sep 12 53° 76° 40° (1975) 90° (2000) 0.12" NA
Sep 13 52° 75° 34° (1975) 89° (1998) 0.12" NA
Sep 14 52° 75° 36° (1974) 91° (1971) 0.12" NA
Sep 15 52° 75° 35° (2007) 90° (1991) 0.12" NA
Sep 16 51° 74° 35° (2007) 91° (1994) 0.12" NA
Sep 17 51° 74° 40° (1990) 85° (1972) 0.12" NA
Sep 18 51° 74° 39° (1973) 91° (1988) 0.11" NA
Sep 19 50° 73° 37° (1991) 89° (1978) 0.11" NA
Sep 20 50° 73° 30° (1991) 89° (1978) 0.11" NA
Sep 21 49° 73° 32° (1991) 87° (1970) 0.11" NA
Sep 22 49° 72° 30° (1974) 88° (2007) 0.11" NA
Sep 23 49° 72° 30° (1995) 88° (1988) 0.11" NA
Sep 24 48° 72° 30° (1976) 85° (1984) 0.1" NA
Sep 25 48° 71° 35° (2001) 90° (2007) 0.1" NA
Sep 26 48° 71° 33° (1984) 87° (1986) 0.1" NA
Sep 27 47° 71° 27° (1991) 89° (1998) 0.1" NA
Sep 28 47° 70° 28° (1991) 89° (1971) 0.1" NA
Sep 29 46° 70° 30° (1992) 86° (1986) 0.1" NA
Sep 30 46° 70° 31° (1984) 90° (1971) 0.1" NA
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