Lerna, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° 35° -23° (1985) 70° (1950) 2.26" 5.8"
February 24° 40° -17° (1996) 74° (2000) 2.22" 3"
March 33° 52° -8° (1960) 85° (1981) 2.71" 1.4"
April 44° 64° 17° (1987) 89° (1987) 4.01" 0.1"
May 54° 75° 28° (1966) 95° (1987) 4.17" 0"
June 63° 84° 41° (1992) 105° (1954) 4.11" 0"
July 67° 87° 48° (1962) 111° (1954) 4.22" 0"
August 65° 85° 40° (1986) 104° (1988) 2.89" 0"
September 57° 79° 33° (1983) 103° (1954) 3.22" 0"
October 46° 66° 19° (1962) 92° (1954) 3.56" 0"
November 35° 52° -2° (1950) 82° (1950) 3.85" 0.4"
December 24° 38° -20° (1989) 71° (1998) 2.96" 3.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 67° 87° 50° (1984) 97° (1953) 0.15" 0"
Jul 2 67° 87° 49° (2001) 98° (1952) 0.14" 0"
Jul 3 67° 87° 52° (1959) 96° (1954) 0.15" 0"
Jul 4 67° 87° 50° (1968) 99° (1990) 0.15" 0"
Jul 5 67° 87° 50° (1964) 100° (1988) 0.14" 0"
Jul 6 67° 87° 49° (1972) 96° (1977) 0.15" 0"
Jul 7 67° 87° 53° (1983) 98° (1988) 0.15" 0"
Jul 8 67° 87° 52° (1961) 100° (1988) 0.15" 0"
Jul 9 67° 87° 51° (1963) 99° (1988) 0.14" 0"
Jul 10 67° 87° 50° (1963) 99° (1966) 0.15" 0"
Jul 11 67° 87° 53° (1953) 97° (1989) 0.14" 0"
Jul 12 67° 87° 54° (1973) 106° (1954) 0.15" 0"
Jul 13 67° 87° 50° (1975) 102° (1966) 0.15" 0"
Jul 14 67° 87° 50° (1950) 111° (1954) 0.14" 0"
Jul 15 67° 87° 56° (1950) 102° (1988) 0.14" 0"
Jul 16 67° 87° 54° (1967) 99° (1988) 0.15" 0"
Jul 17 67° 87° 55° (1985) 101° (1988) 0.15" 0"
Jul 18 67° 87° 54° (1979) 107° (1954) 0.14" 0"
Jul 19 67° 87° 49° (1984) 100° (1980) 0.14" 0"
Jul 20 67° 86° 53° (1970) 104° (1954) 0.13" 0"
Jul 21 67° 86° 49° (1970) 98° (1983) 0.13" 0"
Jul 22 67° 86° 53° (1970) 100° (1983) 0.14" 0"
Jul 23 67° 86° 53° (1985) 100° (1983) 0.14" 0"
Jul 24 67° 86° 53° (1948) 95° (1965) 0.13" 0"
Jul 25 66° 86° 57° (1950) 97° (1986) 0.12" 0"
Jul 26 66° 86° 52° (1977) 100° (1952) 0.12" 0"
Jul 27 66° 86° 48° (1962) 99° (1952) 0.11" 0"
Jul 28 66° 86° 54° (1962) 97° (1952) 0.11" 0"
Jul 29 66° 86° 52° (1971) 97° (1954) 0.1" 0"
Jul 30 66° 86° 52° (1971) 100° (1999) 0.11" 0"
Jul 31 66° 86° 51° (1971) 98° (1988) 0.11" 0"
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