Iroquois, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 31° -25° (1985) 77° (2005) 1.76" 7.8"
February 18° 36° -21° (1963) 72° (1996) 1.6" 6.9"
March 29° 48° -8° (1960) 90° (1949) 2.77" 3.5"
April 38° 61° 3° (1982) 89° (1986) 3.37" 1.1"
May 50° 73° 27° (1968) 95° (2001) 4.05" 0"
June 60° 82° 37° (2003) 104° (1988) 4.51" 0"
July 63° 85° 43° (2001) 104° (1954) 4.03" 0"
August 60° 83° 38° (1965) 104° (1988) 3.67" 0"
September 53° 78° 27° (1991) 100° (1953) 3.25" 0"
October 41° 65° 16° (1952) 92° (1954) 2.84" 0.1"
November 31° 49° -9° (1950) 81° (1950) 3.2" 2"
December 20° 36° -21° (1989) 70° (1982) 2.43" 6.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 25° 41° 8° (2002) 68° (1970) 0.1" NA
Dec 2 25° 41° 7° (2002) 70° (1982) 0.1" NA
Dec 3 24° 41° 2° (1966) 68° (1982) 0.09" NA
Dec 4 24° 40° 0° (1991) 63° (1956) 0.09" NA
Dec 5 24° 40° 0° (1991) 65° (1982) 0.09" NA
Dec 6 23° 39° -2° (1977) 64° (1980) 0.09" NA
Dec 7 23° 39° -6° (1977) 64° (1951) 0.09" NA
Dec 8 23° 39° -6° (1977) 64° (1966) 0.09" NA
Dec 9 22° 38° -16° (1958) 65° (1991) 0.09" NA
Dec 10 22° 38° -15° (1958) 65° (1971) 0.08" NA
Dec 11 21° 37° -9° (1977) 62° (1949) 0.08" NA
Dec 12 21° 37° -6° (1962) 63° (1949) 0.08" NA
Dec 13 21° 37° -11° (1989) 63° (1975) 0.08" NA
Dec 14 20° 36° -6° (1989) 65° (1975) 0.08" NA
Dec 15 20° 36° -13° (1958) 63° (1971) 0.08" NA
Dec 16 20° 36° -14° (1951) 65° (1984) 0.08" NA
Dec 17 20° 35° -12° (1989) 60° (1984) 0.08" NA
Dec 18 19° 35° -10° (1985) 57° (1962) 0.07" NA
Dec 19 19° 35° -12° (1983) 58° (1957) 0.07" NA
Dec 20 19° 34° -20° (1989) 56° (1988) 0.07" NA
Dec 21 18° 34° -21° (1989) 62° (1967) 0.07" NA
Dec 22 18° 34° -20° (1989) 56° (1957) 0.07" NA
Dec 23 18° 34° -21° (1989) 59° (1982) 0.07" NA
Dec 24 18° 33° -20° (1983) 59° (1982) 0.07" NA
Dec 25 17° 33° -20° (1983) 62° (1982) 0.07" NA
Dec 26 17° 33° -14° (1990) 56° (1959) 0.07" NA
Dec 27 17° 33° -12° (1990) 61° (1959) 0.07" NA
Dec 28 17° 32° -3° (1961) 67° (1984) 0.07" NA
Dec 29 16° 32° -11° (1983) 64° (1984) 0.07" NA
Dec 30 16° 32° -14° (1983) 61° (1965) 0.06" NA
Dec 31 16° 32° -9° (1976) 60° (1951) 0.06" NA
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