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) 1.77" 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
Sep 1 62° 80° 47° (1949) 99° (1953) 0.12" NA
Sep 2 62° 80° 52° (1952) 99° (1953) 0.12" NA
Sep 3 61° 80° 51° (1952) 95° (1953) 0.12" NA
Sep 4 61° 79° 52° (1972) 92° (1954) 0.12" NA
Sep 5 61° 79° 49° (1974) 95° (1954) 0.12" NA
Sep 6 61° 79° 49° (1988) 94° (1954) 0.12" NA
Sep 7 60° 79° 48° (1986) 97° (1960) 0.12" NA
Sep 8 60° 79° 47° (1986) 95° (1964) 0.11" NA
Sep 9 60° 78° 50° (1969) 97° (1978) 0.11" NA
Sep 10 59° 78° 50° (1969) 94° (1983) 0.11" NA
Sep 11 59° 78° 48° (1993) 93° (1978) 0.11" NA
Sep 12 59° 77° 48° (1955) 93° (1962) 0.11" NA
Sep 13 58° 77° 43° (1953) 93° (1962) 0.11" NA
Sep 14 58° 77° 45° (1949) 89° (1971) 0.11" NA
Sep 15 58° 77° 46° (1949) 90° (1994) 0.11" NA
Sep 16 57° 76° 45° (1984) 91° (1994) 0.11" NA
Sep 17 57° 76° 46° (1984) 91° (1955) 0.11" NA
Sep 18 57° 76° 45° (1973) 91° (1955) 0.11" NA
Sep 19 56° 75° 42° (1991) 91° (1948) 0.1" NA
Sep 20 56° 75° 40° (1956) 91° (1978) 0.1" NA
Sep 21 56° 75° 41° (1983) 92° (1970) 0.1" NA
Sep 22 55° 74° 38° (1974) 89° (1956) 0.1" NA
Sep 23 55° 74° 37° (1974) 89° (1986) 0.1" NA
Sep 24 55° 74° 41° (1950) 84° (1958) 0.1" NA
Sep 25 54° 73° 41° (1983) 86° (1986) 0.1" NA
Sep 26 54° 73° 39° (1984) 89° (1986) 0.1" NA
Sep 27 53° 73° 41° (1991) 87° (1954) 0.09" NA
Sep 28 53° 72° 40° (1951) 89° (1971) 0.09" NA
Sep 29 53° 72° 40° (1967) 97° (1953) 0.09" NA
Sep 30 52° 71° 38° (1993) 92° (1971) 0.09" NA
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