Lerna, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 17° 33° -23° (1985) 70° (1950) 2.03" 5.6"
February 21° 39° -17° (1996) 74° (2000) 2.08" 4.5"
March 32° 50° -8° (1960) 85° (1981) 3.06" 2.5"
April 42° 62° 17° (1987) 89° (1987) 3.84" 0.1"
May 53° 73° 28° (1966) 95° (1987) 3.95" 0"
June 63° 83° 41° (1992) 105° (1954) 4.21" 0"
July 66° 86° 48° (1962) 111° (1954) 4.16" 0"
August 64° 84° 40° (1986) 104° (1988) 3.25" 0"
September 56° 78° 33° (1983) 103° (1954) 3.06" 0"
October 45° 66° 19° (1962) 92° (1954) 3.02" 0"
November 33° 51° -2° (1950) 82° (1950) 3.71" 1.1"
December 22° 38° -20° (1989) 71° (1998) 2.84" 4.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 37° 57° 22° (1954) 81° (1963) 0.12" NA
Apr 2 38° 57° 22° (1961) 80° (1963) 0.12" NA
Apr 3 38° 58° 17° (1987) 80° (1978) 0.12" NA
Apr 4 38° 58° 20° (1987) 75° (1986) 0.12" NA
Apr 5 39° 58° 22° (1982) 85° (1988) 0.12" NA
Apr 6 39° 59° 20° (1982) 82° (1967) 0.12" NA
Apr 7 39° 59° 20° (1982) 82° (1954) 0.13" NA
Apr 8 40° 60° 20° (1972) 83° (2001) 0.13" NA
Apr 9 40° 60° 20° (1997) 84° (2001) 0.13" NA
Apr 10 40° 60° 24° (1960) 82° (1977) 0.13" NA
Apr 11 41° 61° 25° (1973) 82° (1977) 0.13" NA
Apr 12 41° 61° 24° (1957) 82° (1971) 0.13" NA
Apr 13 41° 62° 22° (1950) 82° (1977) 0.13" NA
Apr 14 42° 62° 27° (1950) 83° (1977) 0.13" NA
Apr 15 42° 62° 26° (1950) 83° (1977) 0.13" NA
Apr 16 42° 63° 27° (1962) 86° (1977) 0.13" NA
Apr 17 43° 63° 29° (1953) 86° (1977) 0.13" NA
Apr 18 43° 63° 26° (1953) 85° (1977) 0.13" NA
Apr 19 43° 64° 23° (1983) 82° (1985) 0.13" NA
Apr 20 44° 64° 27° (1983) 85° (1987) 0.13" NA
Apr 21 44° 64° 29° (1950) 88° (1987) 0.13" NA
Apr 22 44° 65° 28° (1986) 88° (1980) 0.13" NA
Apr 23 45° 65° 28° (1956) 85° (1960) 0.13" NA
Apr 24 45° 66° 30° (1956) 88° (1960) 0.13" NA
Apr 25 45° 66° 32° (1980) 88° (1986) 0.13" NA
Apr 26 46° 66° 31° (1976) 88° (1989) 0.13" NA
Apr 27 46° 67° 32° (1976) 85° (1981) 0.13" NA
Apr 28 47° 67° 31° (1992) 85° (1970) 0.13" NA
Apr 29 47° 67° 32° (1977) 89° (1987) 0.13" NA
Apr 30 47° 68° 32° (1958) 86° (2001) 0.13" NA
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