Mason City, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 16° 34° -24° (1977) 70° (1989) 1.92" 5.3"
February 20° 38° -21° (1996) 75° (1996) 1.68" 4.3"
March 30° 51° -8° (1978) 87° (1986) 2.49" 1.4"
April 41° 64° 15° (1982) 91° (1986) 3.61" 0.3"
May 52° 74° 29° (1976) 96° (1967) 4.07" 0"
June 62° 83° 39° (2003) 103° (1988) 4.04" 0"
July 65° 86° 45° (1962) 103° (1966) 4.6" 0"
August 63° 84° 40° (1986) 103° (1987) 3.29" 0"
September 54° 79° 28° (1995) 99° (1984) 3.04" 0"
October 43° 66° 18° (1962) 94° (2006) 2.87" 0"
November 31° 51° -5° (1964) 82° (2000) 3.11" 0.2"
December 20° 37° -23° (1989) 73° (1998) 2.33" 3.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 17° 34° -12° (1968) 56° (2007) 0.07" 0.2"
Jan 2 17° 34° -10° (2010) 65° (1997) 0.07" 0.1"
Jan 3 17° 34° -9° (2010) 62° (1998) 0.07" 0.2"
Jan 4 17° 33° -10° (1999) 68° (1997) 0.06" 0.2"
Jan 5 16° 33° -21° (1999) 56° (1998) 0.07" 0.1"
Jan 6 16° 33° -17° (1979) 54° (2008) 0.07" 0.2"
Jan 7 16° 33° -15° (1968) 64° (1989) 0.07" 0.2"
Jan 8 16° 33° -19° (1979) 68° (2008) 0.06" 0.2"
Jan 9 16° 33° -8° (1999) 59° (2003) 0.07" 0.1"
Jan 10 16° 33° -20° (1982) 59° (1975) 0.06" 0.2"
Jan 11 16° 33° -17° (1977) 55° (1986) 0.07" 0.2"
Jan 12 16° 33° -19° (1974) 53° (2007) 0.07" 0.2"
Jan 13 16° 33° -8° (1997) 51° (2007) 0.06" 0.1"
Jan 14 16° 33° -12° (1982) 50° (1980) 0.06" 0.2"
Jan 15 16° 33° -20° (1979) 59° (1990) 0.07" 0.2"
Jan 16 16° 33° -19° (1977) 68° (1990) 0.07" 0.2"
Jan 17 16° 33° -24° (1977) 62° (1990) 0.06" 0.1"
Jan 18 16° 34° -16° (1994) 59° (1996) 0.07" 0.2"
Jan 19 16° 34° -18° (1994) 58° (1989) 0.06" 0.2"
Jan 20 16° 34° -22° (1985) 51° (1967) 0.06" 0.2"
Jan 21 16° 34° -17° (1984) 64° (1986) 0.06" 0.1"
Jan 22 16° 34° -8° (1970) 64° (1967) 0.06" 0.2"
Jan 23 16° 34° -11° (1987) 67° (1967) 0.05" 0.2"
Jan 24 16° 34° -12° (1963) 69° (1967) 0.06" 0.2"
Jan 25 16° 34° -8° (1987) 60° (1967) 0.05" 0.1"
Jan 26 16° 34° -8° (1987) 53° (1989) 0.05" 0.2"
Jan 27 16° 34° -10° (1963) 58° (1999) 0.05" 0.1"
Jan 28 16° 34° -19° (1963) 65° (1970) 0.06" 0.2"
Jan 29 16° 34° -9° (1972) 65° (2002) 0.05" 0.2"
Jan 30 16° 34° -6° (1965) 61° (2008) 0.05" 0.1"
Jan 31 16° 35° -15° (1996) 70° (1989) 0.06" 0.2"
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