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
Jan 1 19° 33° -9° (1968) 48° (1950) 0.08" NA
Jan 2 19° 33° -11° (1979) 59° (1950) 0.08" NA
Jan 3 18° 32° -10° (1979) 60° (1950) 0.08" NA
Jan 4 18° 32° -7° (1969) 50° (1993) 0.07" NA
Jan 5 18° 32° -10° (1988) 50° (1955) 0.07" NA
Jan 6 18° 32° -10° (1988) 46° (1987) 0.07" NA
Jan 7 18° 32° -12° (1968) 52° (1949) 0.07" NA
Jan 8 18° 32° -8° (1976) 56° (1989) 0.07" NA
Jan 9 18° 32° -9° (1962) 48° (1990) 0.07" NA
Jan 10 18° 32° -21° (1982) 55° (1975) 0.07" NA
Jan 11 18° 32° -14° (1982) 60° (1975) 0.07" NA
Jan 12 18° 32° -6° (1977) 58° (1960) 0.07" NA
Jan 13 18° 32° -5° (1963) 55° (1960) 0.07" NA
Jan 14 18° 31° -6° (1963) 57° (1952) 0.07" NA
Jan 15 18° 32° -16° (1972) 62° (1949) 0.07" NA
Jan 16 18° 32° -16° (1977) 56° (1949) 0.07" NA
Jan 17 18° 32° -16° (1982) 59° (1952) 0.07" NA
Jan 18 18° 32° -20° (1994) 56° (1973) 0.07" NA
Jan 19 18° 32° -17° (1994) 53° (1952) 0.07" NA
Jan 20 18° 32° -24° (1985) 53° (1954) 0.07" NA
Jan 21 18° 32° -15° (1985) 55° (1957) 0.07" NA
Jan 22 18° 32° -7° (1970) 57° (1967) 0.07" NA
Jan 23 18° 32° -16° (1963) 59° (1967) 0.07" NA
Jan 24 18° 32° -11° (1963) 65° (1967) 0.07" NA
Jan 25 18° 32° -3° (1963) 67° (1950) 0.07" NA
Jan 26 19° 32° -3° (1955) 55° (1973) 0.07" NA
Jan 27 19° 33° -8° (1955) 57° (1973) 0.07" NA
Jan 28 19° 33° -13° (1977) 54° (1970) 0.07" NA
Jan 29 19° 33° -16° (1966) 51° (1968) 0.06" NA
Jan 30 20° 33° -15° (1966) 55° (1988) 0.06" NA
Jan 31 20° 33° -5° (1971) 62° (1989) 0.06" NA
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