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
Oct 1 50° 73° 33° (1984) 91° (1952) 0.1" NA
Oct 2 50° 72° 29° (1985) 92° (1953) 0.1" NA
Oct 3 50° 72° 28° (1974) 92° (1954) 0.1" NA
Oct 4 49° 72° 33° (1980) 89° (1951) 0.09" NA
Oct 5 49° 71° 28° (1980) 87° (1982) 0.09" NA
Oct 6 49° 71° 28° (1952) 87° (1963) 0.09" NA
Oct 7 48° 70° 25° (1952) 89° (1963) 0.09" NA
Oct 8 48° 70° 23° (1952) 88° (1980) 0.09" NA
Oct 9 47° 69° 31° (2000) 84° (1949) 0.09" NA
Oct 10 47° 69° 26° (1964) 86° (1954) 0.09" NA
Oct 11 47° 68° 30° (1964) 87° (1962) 0.09" NA
Oct 12 46° 68° 25° (1987) 88° (1962) 0.09" NA
Oct 13 46° 68° 26° (1988) 88° (1989) 0.09" NA
Oct 14 45° 67° 27° (1979) 86° (1996) 0.09" NA
Oct 15 45° 67° 32° (1986) 87° (1963) 0.09" NA
Oct 16 45° 66° 29° (1991) 83° (1956) 0.09" NA
Oct 17 44° 66° 30° (1948) 85° (1950) 0.1" NA
Oct 18 44° 65° 27° (1976) 84° (1950) 0.1" NA
Oct 19 44° 65° 26° (1972) 87° (1953) 0.1" NA
Oct 20 43° 64° 24° (1972) 86° (1953) 0.1" NA
Oct 21 43° 64° 20° (1952) 86° (1953) 0.1" NA
Oct 22 42° 63° 24° (1976) 86° (1953) 0.1" NA
Oct 23 42° 63° 22° (1981) 82° (1963) 0.1" NA
Oct 24 42° 62° 20° (1981) 80° (1963) 0.1" NA
Oct 25 41° 62° 28° (1962) 82° (1963) 0.1" NA
Oct 26 41° 61° 19° (1962) 83° (1963) 0.1" NA
Oct 27 41° 61° 26° (1957) 79° (1950) 0.11" NA
Oct 28 40° 60° 23° (1976) 80° (1999) 0.11" NA
Oct 29 40° 60° 20° (1952) 79° (1971) 0.11" NA
Oct 30 39° 59° 22° (1980) 85° (1950) 0.11" NA
Oct 31 39° 58° 26° (1988) 84° (1950) 0.11" NA
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