Merna, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 15° 33° -23° (1985) 66° (1989) 2.13" 7.1"
February 19° 38° -20° (1982) 71° (2000) 2.01" 5.1"
March 27° 49° -6° (1978) 85° (1986) 2.71" 1.5"
April 38° 62° 10° (1982) 91° (1986) 3.67" 0.7"
May 49° 73° 26° (1989) 93° (1991) 4.64" 0"
June 60° 83° 35° (1993) 103° (1988) 3.91" 0"
July 63° 86° 48° (2007) 101° (1988) 4.16" 0"
August 61° 84° 41° (1986) 103° (1988) 3.8" 0"
September 53° 78° 31° (1984) 96° (1983) 3.14" 0"
October 41° 65° 18° (1981) 89° (2007) 3.28" 0.1"
November 31° 50° 1° (1977) 80° (2000) 3.27" 0.3"
December 19° 36° -22° (1989) 71° (1998) 2.7" 5.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 16° 33° -1° (1991) 62° (2005) 0.08" 0.2"
Jan 2 16° 33° -10° (1979) 57° (2005) 0.07" 0.2"
Jan 3 15° 33° -10° (2010) 63° (2004) 0.07" 0.2"
Jan 4 15° 33° -14° (1999) 60° (1997) 0.08" 0.2"
Jan 5 15° 33° -14° (1999) 65° (1997) 0.07" 0.2"
Jan 6 15° 33° -14° (1999) 55° (1998) 0.07" 0.3"
Jan 7 15° 33° -4° (1999) 64° (2008) 0.08" 0.2"
Jan 8 15° 33° -10° (1979) 66° (2008) 0.07" 0.2"
Jan 9 15° 33° -8° (1981) 56° (2008) 0.07" 0.2"
Jan 10 15° 33° -21° (1982) 54° (2002) 0.07" 0.2"
Jan 11 15° 33° -10° (1979) 54° (1980) 0.08" 0.2"
Jan 12 15° 33° -9° (1997) 53° (1995) 0.07" 0.2"
Jan 13 15° 33° -9° (1997) 64° (2005) 0.06" 0.2"
Jan 14 15° 33° -4° (1979) 51° (1980) 0.06" 0.3"
Jan 15 15° 33° -21° (1979) 56° (1990) 0.07" 0.2"
Jan 16 15° 33° -18° (2009) 61° (1990) 0.07" 0.2"
Jan 17 14° 33° -18° (2009) 61° (1990) 0.07" 0.3"
Jan 18 14° 33° -19° (1994) 58° (1996) 0.07" 0.2"
Jan 19 14° 33° -20° (1994) 59° (1996) 0.06" 0.3"
Jan 20 14° 33° -23° (1985) 53° (1989) 0.07" 0.2"
Jan 21 15° 33° -18° (1984) 61° (1986) 0.07" 0.3"
Jan 22 15° 33° -10° (1978) 50° (1989) 0.06" 0.2"
Jan 23 15° 33° -7° (1987) 56° (2002) 0.07" 0.3"
Jan 24 15° 33° -10° (1987) 60° (2002) 0.07" 0.2"
Jan 25 15° 33° -10° (2008) 56° (1990) 0.06" 0.3"
Jan 26 15° 33° -7° (1985) 54° (1981) 0.07" 0.2"
Jan 27 15° 33° -5° (1986) 58° (1990) 0.06" 0.2"
Jan 28 15° 34° -9° (1997) 58° (2002) 0.07" 0.3"
Jan 29 15° 34° -9° (1997) 63° (2002) 0.06" 0.2"
Jan 30 15° 34° -10° (2004) 58° (1988) 0.07" 0.3"
Jan 31 15° 34° -11° (1996) 66° (1989) 0.06" 0.2"
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