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
May 1 43° 65° 29° (1978) 84° (2001) 0.13" 0"
May 2 43° 65° 29° (2008) 87° (1992) 0.13" 0"
May 3 44° 66° 28° (2004) 82° (2001) 0.13" 0"
May 4 44° 66° 29° (2005) 85° (2001) 0.14" 0"
May 5 44° 66° 34° (2005) 84° (1980) 0.14" 0"
May 6 45° 67° 32° (1976) 85° (1980) 0.13" 0"
May 7 45° 67° 32° (1976) 86° (2004) 0.13" 0"
May 8 45° 67° 32° (1976) 83° (2007) 0.13" 0"
May 9 46° 68° 30° (1983) 87° (1979) 0.13" 0"
May 10 46° 68° 31° (1983) 87° (2004) 0.14" 0"
May 11 46° 68° 34° (1981) 86° (1979) 0.13" 0"
May 12 46° 69° 34° (1981) 87° (1987) 0.14" 0"
May 13 47° 69° 34° (1996) 84° (1993) 0.14" 0"
May 14 47° 69° 38° (1996) 88° (1991) 0.14" 0"
May 15 47° 70° 37° (1997) 89° (2007) 0.13" 0"
May 16 48° 70° 33° (1997) 88° (2001) 0.14" 0"
May 17 48° 70° 34° (2009) 88° (2001) 0.13" 0"
May 18 48° 71° 32° (2002) 88° (1987) 0.14" 0"
May 19 49° 71° 34° (2002) 91° (1996) 0.14" 0"
May 20 49° 71° 37° (2006) 90° (1998) 0.14" 0"
May 21 49° 72° 29° (2002) 84° (2004) 0.15" 0"
May 22 49° 72° 33° (2002) 87° (1987) 0.15" 0"
May 23 50° 72° 39° (2006) 89° (1994) 0.14" 0"
May 24 50° 73° 38° (1992) 88° (2007) 0.14" 0"
May 25 50° 73° 33° (1992) 86° (2007) 0.14" 0"
May 26 51° 73° 36° (1983) 87° (1977) 0.13" 0"
May 27 51° 74° 31° (1992) 90° (1985) 0.13" 0"
May 28 51° 74° 35° (1992) 90° (1978) 0.12" 0"
May 29 52° 74° 39° (1992) 92° (2006) 0.14" 0"
May 30 52° 75° 35° (1996) 91° (2006) 0.13" 0"
May 31 52° 75° 38° (1990) 91° (1988) 0.13" 0"
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