Plymouth, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 16° 33° -23° (1999) 70° (1967) 1.66" 4.4"
February 19° 39° -20° (1979) 76° (1972) 1.86" 3.7"
March 29° 50° -14° (1978) 84° (1986) 2.53" 1.2"
April 41° 63° 13° (1982) 93° (1986) 3.84" 0.2"
May 51° 73° 29° (1966) 93° (2006) 5.03" 0"
June 61° 83° 41° (1972) 101° (1988) 4.84" 0"
July 65° 86° 45° (1967) 105° (1966) 4.24" 0"
August 63° 85° 40° (1967) 103° (2007) 3.86" 0"
September 53° 78° 30° (1984) 98° (1990) 3.45" 0"
October 42° 66° 19° (1972) 95° (2006) 3.17" 0"
November 32° 51° -14° (1964) 80° (1964) 2.9" 0.8"
December 20° 37° -22° (1989) 71° (1998) 2.35" 3.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 16° 35° -13° (1996) 69° (1989) 0.06" 0.2"
Feb 2 16° 35° -10° (1996) 55° (1986) 0.05" 0.1"
Feb 3 16° 35° -18° (1996) 60° (1992) 0.05" 0.2"
Feb 4 17° 35° -18° (1996) 66° (1992) 0.06" 0.1"
Feb 5 17° 35° -15° (1979) 55° (1964) 0.05" 0.2"
Feb 6 17° 36° -20° (1978) 57° (2005) 0.06" 0.1"
Feb 7 17° 36° -10° (1979) 56° (1966) 0.05" 0.2"
Feb 8 17° 36° -6° (1985) 55° (1966) 0.06" 0.1"
Feb 9 18° 36° -20° (1979) 67° (1990) 0.06" 0.2"
Feb 10 18° 37° -12° (1982) 66° (1976) 0.07" 0.2"
Feb 11 18° 37° -12° (1981) 64° (1999) 0.07" 0.1"
Feb 12 18° 37° -13° (1988) 69° (1999) 0.06" 0.2"
Feb 13 19° 38° -11° (1988) 68° (1990) 0.07" 0.1"
Feb 14 19° 38° -7° (1986) 62° (1967) 0.06" 0.1"
Feb 15 19° 38° -9° (1986) 65° (1976) 0.06" 0.2"
Feb 16 19° 39° -10° (2007) 67° (1976) 0.06" 0.1"
Feb 17 20° 39° -11° (2007) 62° (1981) 0.06" 0.1"
Feb 18 20° 39° -10° (1978) 67° (1971) 0.06" 0.2"
Feb 19 20° 40° -6° (1993) 65° (1994) 0.07" 0.1"
Feb 20 21° 40° 2° (2008) 67° (1983) 0.07" 0.1"
Feb 21 21° 40° -5° (1963) 66° (1996) 0.07" 0.1"
Feb 22 21° 41° -6° (1963) 68° (1977) 0.07" 0.1"
Feb 23 22° 41° -6° (1989) 64° (1977) 0.08" 0.1"
Feb 24 22° 42° -5° (1989) 69° (1976) 0.07" 0.2"
Feb 25 23° 42° -4° (1967) 67° (1976) 0.07" 0.1"
Feb 26 23° 42° -13° (1963) 68° (1995) 0.07" 0"
Feb 27 23° 43° 1° (1963) 75° (1976) 0.08" 0.1"
Feb 28 24° 43° 5° (1993) 66° (1972) 0.07" 0.1"
Feb 29 24° 44° 7° (1996) 76° (1972) 0.07" NA
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