Dewey, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 16° 34° -27° (1985) 68° (1950) 2.07" NA
February 20° 39° -19° (1996) 72° (2000) 2.1" NA
March 30° 50° -13° (1980) 85° (1986) 2.98" NA
April 40° 64° 10° (1982) 90° (1986) 3.84" NA
May 51° 74° 26° (2002) 97° (1991) 4.36" NA
June 62° 84° 38° (1993) 104° (1988) 3.94" NA
July 65° 87° 43° (2001) 109° (1954) 4.59" NA
August 62° 85° 38° (1986) 102° (1988) 4.05" NA
September 54° 79° 29° (2001) 101° (1953) 3.09" NA
October 42° 66° 21° (2000) 93° (2007) 3.32" NA
November 32° 52° -5° (1950) 81° (1968) 3.47" NA
December 21° 38° -22° (1989) 70° (1998) 2.59" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 60° 84° 44° (1987) 100° (1953) 0.12" NA
Sep 2 59° 84° 43° (1949) 101° (1953) 0.12" NA
Sep 3 59° 84° 43° (1994) 98° (2000) 0.11" NA
Sep 4 59° 83° 40° (1997) 98° (1954) 0.12" NA
Sep 5 58° 83° 42° (1997) 100° (1954) 0.11" NA
Sep 6 58° 83° 41° (2000) 99° (1954) 0.12" NA
Sep 7 58° 83° 46° (1956) 98° (1990) 0.12" NA
Sep 8 57° 82° 38° (1986) 96° (1960) 0.11" NA
Sep 9 57° 82° 45° (1969) 97° (1955) 0.12" NA
Sep 10 57° 82° 43° (1969) 96° (1983) 0.11" NA
Sep 11 56° 81° 42° (1967) 95° (1983) 0.11" NA
Sep 12 56° 81° 42° (1993) 92° (1952) 0.1" NA
Sep 13 55° 81° 37° (1953) 96° (1991) 0.11" NA
Sep 14 55° 80° 39° (1963) 97° (1991) 0.1" NA
Sep 15 54° 80° 41° (1975) 95° (1991) 0.1" NA
Sep 16 54° 80° 36° (2000) 95° (1991) 0.1" NA
Sep 17 53° 79° 38° (1976) 92° (1955) 0.09" NA
Sep 18 53° 79° 40° (1959) 93° (1953) 0.09" NA
Sep 19 52° 78° 35° (1991) 93° (1948) 0.1" NA
Sep 20 52° 78° 35° (1991) 95° (1978) 0.09" NA
Sep 21 51° 77° 38° (1962) 93° (1978) 0.1" NA
Sep 22 51° 77° 34° (1989) 94° (2007) 0.09" NA
Sep 23 50° 77° 32° (1989) 95° (2005) 0.09" NA
Sep 24 50° 76° 33° (1989) 93° (2007) 0.1" NA
Sep 25 50° 76° 29° (2001) 93° (2007) 0.09" NA
Sep 26 49° 75° 30° (2001) 90° (1986) 0.1" NA
Sep 27 49° 75° 34° (1984) 93° (1998) 0.09" NA
Sep 28 48° 74° 36° (2001) 93° (1953) 0.1" NA
Sep 29 48° 74° 33° (1967) 99° (1953) 0.09" NA
Sep 30 47° 73° 31° (1993) 91° (1971) 0.09" NA
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