Fort Dearborn, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 18° 32° -24° (1985) 67° (1950) 2.17" NA
February 24° 38° -12° (1951) 71° (1976) 1.85" NA
March 32° 47° 0° (1962) 84° (1986) 3.01" NA
April 42° 59° 13° (1982) 91° (1986) 3.65" NA
May 51° 70° 32° (1954) 94° (1991) 3.7" NA
June 61° 80° 41° (1972) 104° (1988) 4.3" NA
July 66° 84° 51° (1975) 102° (1991) 3.68" NA
August 65° 83° 49° (1965) 101° (1988) 3.86" NA
September 57° 76° 37° (1974) 99° (1953) 3.21" NA
October 46° 64° 24° (1981) 92° (1971) 2.71" NA
November 35° 49° 0° (1950) 80° (1950) 3.32" NA
December 24° 37° -20° (1983) 69° (1982) 2.63" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 37° 53° 25° (1954) 86° (1981) 0.12" NA
Apr 2 37° 54° 24° (1961) 81° (1963) 0.12" NA
Apr 3 38° 54° 20° (1954) 80° (1956) 0.12" NA
Apr 4 38° 55° 19° (1982) 73° (1981) 0.12" NA
Apr 5 38° 55° 28° (1950) 80° (1988) 0.12" NA
Apr 6 39° 55° 18° (1979) 84° (1988) 0.12" NA
Apr 7 39° 56° 13° (1982) 83° (1991) 0.12" NA
Apr 8 39° 56° 25° (1972) 79° (1986) 0.12" NA
Apr 9 39° 56° 25° (1989) 76° (1952) 0.12" NA
Apr 10 40° 57° 23° (1989) 80° (1977) 0.12" NA
Apr 11 40° 57° 28° (1973) 84° (1977) 0.12" NA
Apr 12 40° 58° 22° (1957) 85° (1971) 0.12" NA
Apr 13 41° 58° 22° (1950) 84° (1977) 0.12" NA
Apr 14 41° 58° 31° (1950) 78° (1976) 0.12" NA
Apr 15 41° 59° 29° (1962) 82° (1976) 0.13" NA
Apr 16 42° 59° 28° (1961) 84° (1976) 0.13" NA
Apr 17 42° 60° 30° (1961) 85° (1976) 0.13" NA
Apr 18 42° 60° 30° (1983) 85° (1976) 0.13" NA
Apr 19 43° 60° 28° (1983) 86° (1977) 0.13" NA
Apr 20 43° 61° 32° (1953) 86° (1985) 0.12" NA
Apr 21 43° 61° 33° (1982) 84° (1985) 0.12" NA
Apr 22 44° 61° 31° (1986) 87° (1980) 0.12" NA
Apr 23 44° 62° 32° (1956) 89° (1980) 0.12" NA
Apr 24 44° 62° 31° (1967) 85° (1960) 0.12" NA
Apr 25 44° 62° 32° (1967) 88° (1990) 0.12" NA
Apr 26 45° 63° 34° (1972) 89° (1990) 0.12" NA
Apr 27 45° 63° 33° (1950) 91° (1986) 0.12" NA
Apr 28 45° 64° 34° (1950) 88° (1986) 0.12" NA
Apr 29 46° 64° 31° (1958) 86° (1970) 0.12" NA
Apr 30 46° 64° 33° (1963) 86° (1962) 0.12" NA
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