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
Aug 1 67° 84° 58° (1990) 99° (1988) 0.12" NA
Aug 2 67° 84° 57° (1965) 101° (1988) 0.12" NA
Aug 3 67° 84° 55° (1950) 100° (1991) 0.12" NA
Aug 4 67° 84° 56° (1978) 98° (1956) 0.12" NA
Aug 5 67° 84° 53° (1972) 97° (1988) 0.12" NA
Aug 6 67° 84° 55° (1948) 96° (1968) 0.12" NA
Aug 7 67° 84° 57° (1989) 94° (1984) 0.12" NA
Aug 8 67° 84° 56° (1989) 97° (1983) 0.12" NA
Aug 9 66° 84° 52° (1972) 99° (1983) 0.12" NA
Aug 10 66° 84° 53° (1972) 96° (1984) 0.12" NA
Aug 11 66° 84° 53° (1965) 91° (1983) 0.13" NA
Aug 12 66° 83° 54° (1964) 94° (1988) 0.13" NA
Aug 13 66° 83° 54° (1964) 95° (1988) 0.13" NA
Aug 14 66° 83° 51° (1964) 93° (1988) 0.13" NA
Aug 15 66° 83° 53° (1964) 95° (1965) 0.13" NA
Aug 16 66° 83° 55° (1979) 100° (1988) 0.13" NA
Aug 17 65° 83° 53° (1976) 101° (1988) 0.13" NA
Aug 18 65° 83° 53° (1963) 100° (1988) 0.13" NA
Aug 19 65° 82° 55° (1950) 98° (1983) 0.13" NA
Aug 20 65° 82° 51° (1955) 99° (1983) 0.13" NA
Aug 21 65° 82° 50° (1950) 97° (1955) 0.13" NA
Aug 22 65° 82° 58° (1950) 96° (1983) 0.13" NA
Aug 23 64° 82° 54° (1987) 96° (1962) 0.13" NA
Aug 24 64° 82° 54° (1966) 98° (1948) 0.13" NA
Aug 25 64° 82° 53° (1958) 95° (1948) 0.12" NA
Aug 26 64° 81° 54° (1964) 95° (1991) 0.12" NA
Aug 27 63° 81° 55° (1967) 97° (1973) 0.12" NA
Aug 28 63° 81° 50° (1965) 97° (1973) 0.12" NA
Aug 29 63° 81° 49° (1965) 96° (1984) 0.12" NA
Aug 30 63° 81° 52° (1986) 96° (1984) 0.12" NA
Aug 31 62° 80° 50° (1988) 99° (1953) 0.12" NA
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