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
Feb 1 16° 35° -12° (1996) 60° (1968) 0.06" NA
Feb 2 17° 35° -12° (1996) 55° (1968) 0.05" NA
Feb 3 17° 35° -19° (1996) 51° (1992) 0.06" NA
Feb 4 17° 35° -15° (1996) 60° (1992) 0.06" NA
Feb 5 17° 36° -14° (1979) 54° (2005) 0.07" NA
Feb 6 17° 36° -12° (1979) 58° (1993) 0.06" NA
Feb 7 18° 36° -14° (1977) 51° (1965) 0.07" NA
Feb 8 18° 36° -14° (1977) 60° (1966) 0.07" NA
Feb 9 18° 37° -12° (1979) 61° (1990) 0.07" NA
Feb 10 18° 37° -14° (1982) 61° (2009) 0.08" NA
Feb 11 19° 37° -13° (1982) 65° (1976) 0.07" NA
Feb 12 19° 37° -8° (1981) 70° (1999) 0.08" NA
Feb 13 19° 38° -8° (1988) 60° (1984) 0.08" NA
Feb 14 19° 38° -5° (1986) 66° (1954) 0.07" NA
Feb 15 20° 38° -8° (2007) 68° (1954) 0.07" NA
Feb 16 20° 39° -10° (1958) 68° (1976) 0.07" NA
Feb 17 20° 39° -10° (1958) 61° (2006) 0.06" NA
Feb 18 21° 39° -10° (1993) 64° (1961) 0.07" NA
Feb 19 21° 40° -9° (1979) 62° (1981) 0.07" NA
Feb 20 22° 40° -8° (1979) 60° (1954) 0.07" NA
Feb 21 22° 40° -4° (1963) 65° (1983) 0.08" NA
Feb 22 22° 41° -6° (1963) 67° (1983) 0.07" NA
Feb 23 23° 41° 0° (1978) 66° (1983) 0.08" NA
Feb 24 23° 42° -3° (1967) 65° (1996) 0.08" NA
Feb 25 23° 42° -5° (1967) 67° (2000) 0.08" NA
Feb 26 24° 42° -13° (1963) 72° (2000) 0.09" NA
Feb 27 24° 43° -12° (1963) 72° (1996) 0.08" NA
Feb 28 25° 43° 0° (2002) 63° (1972) 0.09" NA
Feb 29 25° 43° -5° (1980) 70° (1976) 0.09" NA
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