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
May 1 49° 70° 30° (1963) 88° (1952) 0.14" 0"
May 2 49° 70° 31° (1966) 88° (1959) 0.15" 0"
May 3 50° 71° 32° (1967) 87° (1949) 0.14" 0"
May 4 50° 71° 32° (1954) 90° (1959) 0.14" 0"
May 5 50° 71° 35° (1957) 93° (1952) 0.15" 0"
May 6 51° 72° 34° (1968) 89° (1949) 0.14" 0"
May 7 51° 72° 31° (1989) 89° (1986) 0.14" 0"
May 8 51° 72° 33° (1976) 88° (1963) 0.13" 0"
May 9 52° 73° 31° (1966) 89° (1963) 0.14" 0"
May 10 52° 73° 28° (1966) 92° (1963) 0.14" 0"
May 11 52° 73° 35° (1949) 86° (1987) 0.14" 0"
May 12 53° 73° 30° (1981) 89° (1956) 0.14" 0"
May 13 53° 74° 36° (1960) 88° (1956) 0.13" 0"
May 14 53° 74° 38° (1996) 92° (1987) 0.14" 0"
May 15 53° 74° 38° (1973) 90° (2001) 0.13" 0"
May 16 54° 75° 36° (1959) 92° (2001) 0.13" 0"
May 17 54° 75° 38° (1973) 92° (1962) 0.12" 0"
May 18 54° 75° 39° (1973) 90° (1962) 0.13" 0"
May 19 55° 76° 42° (1961) 91° (1998) 0.13" 0"
May 20 55° 76° 37° (1954) 95° (1987) 0.14" 0"
May 21 55° 76° 38° (1954) 94° (1987) 0.13" 0"
May 22 56° 76° 39° (1963) 91° (1964) 0.13" 0"
May 23 56° 77° 38° (1961) 91° (1975) 0.13" 0"
May 24 56° 77° 34° (1956) 89° (1950) 0.13" 0"
May 25 57° 77° 39° (1949) 90° (1953) 0.13" 0"
May 26 57° 78° 36° (1961) 92° (1953) 0.13" 0"
May 27 57° 78° 35° (1961) 92° (1987) 0.13" 0"
May 28 58° 78° 42° (1992) 93° (1991) 0.13" 0"
May 29 58° 79° 39° (1965) 92° (1969) 0.13" 0"
May 30 58° 79° 40° (1961) 92° (1953) 0.13" 0"
May 31 59° 79° 41° (1966) 93° (1988) 0.13" 0"
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