Algonquin, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -27° (1985) 62° (1997) 1.86" 9.2"
February 17° 34° -22° (1996) 70° (2000) 1.62" 6.4"
March 27° 46° -8° (2002) 82° (1986) 2.29" 3"
April 37° 59° 11° (1982) 91° (1986) 3.69" 0.5"
May 48° 70° 28° (2004) 92° (2006) 4.2" 0"
June 58° 80° 36° (2003) 101° (1988) 3.98" 0"
July 63° 84° 45° (1979) 101° (2005) 3.8" 0"
August 61° 82° 40° (1986) 98° (2001) 4.8" 0"
September 52° 75° 29° (1995) 95° (1990) 3.37" 0"
October 40° 63° 18° (1988) 89° (1975) 2.91" 0"
November 30° 48° -7° (1976) 75° (2000) 3.13" 0.7"
December 18° 34° -24° (1983) 67° (2001) 2.18" 9.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 58° 80° 46° (1994) 93° (2000) 0.13" 0"
Sep 2 58° 80° 46° (2009) 94° (2000) 0.12" 0"
Sep 3 58° 79° 47° (1987) 92° (1999) 0.12" 0"
Sep 4 57° 79° 44° (1997) 91° (1999) 0.12" 0"
Sep 5 57° 79° 44° (1988) 92° (1999) 0.12" 0"
Sep 6 56° 79° 41° (1988) 93° (1999) 0.11" 0"
Sep 7 56° 78° 38° (1986) 95° (1990) 0.12" 0"
Sep 8 56° 78° 39° (1986) 90° (1978) 0.11" 0"
Sep 9 55° 78° 42° (1986) 95° (1978) 0.11" 0"
Sep 10 55° 77° 43° (1979) 93° (1978) 0.12" 0"
Sep 11 54° 77° 40° (1993) 91° (1978) 0.1" 0"
Sep 12 54° 77° 42° (1993) 91° (2005) 0.1" 0"
Sep 13 54° 76° 40° (1985) 90° (1998) 0.11" 0"
Sep 14 53° 76° 41° (1983) 93° (1998) 0.11" 0"
Sep 15 53° 75° 35° (2007) 90° (1994) 0.11" 0"
Sep 16 52° 75° 36° (2007) 89° (1991) 0.11" 0"
Sep 17 52° 75° 40° (2000) 86° (1997) 0.11" 0"
Sep 18 51° 74° 40° (1981) 90° (1988) 0.11" 0"
Sep 19 51° 74° 40° (1991) 88° (2007) 0.11" 0"
Sep 20 50° 73° 36° (1991) 89° (1978) 0.11" 0"
Sep 21 50° 73° 36° (1991) 87° (1998) 0.12" 0"
Sep 22 49° 73° 34° (1983) 88° (2007) 0.11" 0"
Sep 23 49° 72° 29° (1995) 88° (2005) 0.12" 0"
Sep 24 48° 72° 29° (1995) 85° (2004) 0.11" 0"
Sep 25 48° 71° 34° (1989) 90° (2007) 0.12" 0"
Sep 26 47° 71° 35° (1980) 90° (2007) 0.11" 0"
Sep 27 47° 70° 31° (1991) 90° (1998) 0.11" 0"
Sep 28 46° 70° 31° (1991) 86° (1998) 0.11" 0"
Sep 29 46° 70° 34° (1992) 81° (1979) 0.1" 0"
Sep 30 45° 69° 31° (1993) 85° (2002) 0.1" 0"
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