Jerseyville, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 17° 35° -25° (1977) 74° (1950) 1.92" 5.2"
February 22° 41° -22° (1982) 80° (1972) 2.01" 4.5"
March 32° 53° -11° (1960) 86° (1985) 3.51" 3.9"
April 42° 64° 18° (1961) 92° (1951) 4.14" 0.5"
May 52° 74° 28° (1976) 96° (1953) 3.95" 0"
June 61° 83° 37° (1972) 104° (1954) 3.68" 0"
July 66° 88° 43° (1962) 112° (1954) 3.51" 0"
August 63° 86° 38° (1986) 105° (1964) 2.91" 0"
September 55° 79° 27° (1983) 102° (1954) 3.23" 0"
October 43° 68° 17° (1981) 93° (1963) 2.86" 0"
November 34° 53° -2° (1991) 84° (1950) 3.77" 1.3"
December 23° 40° -19° (1989) 74° (1948) 2.82" 4.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 59° 83° 43° (1967) 100° (1953) 0.1" NA
Sep 2 59° 83° 43° (1967) 101° (1984) 0.1" NA
Sep 3 59° 82° 42° (1974) 98° (1954) 0.11" NA
Sep 4 59° 82° 41° (1974) 102° (1954) 0.11" NA
Sep 5 58° 82° 42° (1974) 102° (1954) 0.11" NA
Sep 6 58° 82° 38° (1962) 101° (1954) 0.11" NA
Sep 7 58° 81° 41° (1956) 98° (1954) 0.11" NA
Sep 8 57° 81° 36° (1986) 100° (1960) 0.11" NA
Sep 9 57° 81° 45° (1956) 99° (1955) 0.11" NA
Sep 10 57° 80° 39° (1969) 97° (1955) 0.11" NA
Sep 11 56° 80° 39° (1959) 96° (1983) 0.11" NA
Sep 12 56° 80° 36° (1955) 97° (1956) 0.11" NA
Sep 13 56° 80° 36° (1964) 98° (1956) 0.11" NA
Sep 14 55° 79° 39° (1964) 98° (1998) 0.11" NA
Sep 15 55° 79° 38° (1979) 95° (1971) 0.11" NA
Sep 16 55° 79° 37° (1979) 96° (1954) 0.11" NA
Sep 17 54° 78° 38° (1979) 95° (1954) 0.11" NA
Sep 18 54° 78° 37° (1981) 95° (1953) 0.11" NA
Sep 19 53° 78° 37° (1991) 94° (1955) 0.11" NA
Sep 20 53° 78° 34° (1962) 93° (1972) 0.11" NA
Sep 21 53° 77° 32° (1991) 94° (1955) 0.11" NA
Sep 22 52° 77° 32° (1983) 95° (1956) 0.11" NA
Sep 23 52° 77° 27° (1983) 95° (1956) 0.11" NA
Sep 24 52° 76° 32° (1989) 92° (2007) 0.11" NA
Sep 25 51° 76° 34° (1989) 90° (2007) 0.11" NA
Sep 26 51° 76° 33° (1984) 91° (1953) 0.1" NA
Sep 27 50° 75° 34° (1975) 90° (1953) 0.1" NA
Sep 28 50° 75° 34° (1984) 97° (1953) 0.1" NA
Sep 29 50° 75° 33° (1957) 101° (1953) 0.1" NA
Sep 30 49° 74° 29° (1984) 96° (1953) 0.1" NA
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