Grafton, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 19° 37° -25° (1977) 74° (1950) 2.17" 3.9"
February 23° 42° -22° (1982) 80° (1972) 2.34" 3.4"
March 32° 53° -11° (1960) 86° (1985) 3.24" 1.6"
April 42° 65° 18° (1961) 92° (1951) 3.88" 0.1"
May 53° 75° 28° (1976) 96° (1953) 4.61" 0"
June 62° 83° 37° (1972) 104° (1954) 3.84" 0"
July 66° 87° 43° (1962) 112° (1954) 3.62" 0"
August 63° 86° 38° (1986) 105° (1964) 3.17" 0"
September 54° 79° 27° (1983) 102° (1954) 3.41" 0"
October 43° 67° 17° (1981) 93° (1963) 3.21" 0.1"
November 34° 54° -2° (1991) 84° (1950) 4.08" 0.6"
December 22° 40° -19° (1989) 74° (1948) 3.12" 3.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 20° 38° -14° (1979) 72° (1989) 0.07" 0.1"
Feb 2 20° 39° -12° (1951) 62° (1953) 0.08" 0.2"
Feb 3 20° 39° -16° (1996) 61° (2003) 0.07" 0.1"
Feb 4 20° 39° -16° (1996) 73° (1962) 0.07" 0.1"
Feb 5 20° 39° -15° (1979) 70° (1962) 0.08" 0.2"
Feb 6 21° 39° -16° (1982) 57° (1963) 0.07" 0.1"
Feb 7 21° 40° -18° (1982) 60° (2009) 0.08" 0.1"
Feb 8 21° 40° -5° (1979) 69° (2009) 0.07" 0.1"
Feb 9 21° 40° -22° (1979) 69° (2001) 0.09" 0.1"
Feb 10 22° 40° -22° (1982) 68° (1952) 0.08" 0.1"
Feb 11 22° 41° -12° (1981) 75° (1976) 0.08" 0.2"
Feb 12 22° 41° -11° (1988) 69° (1977) 0.08" 0.1"
Feb 13 22° 41° -5° (1988) 77° (1962) 0.09" 0.1"
Feb 14 23° 42° 3° (1981) 76° (1954) 0.08" 0.2"
Feb 15 23° 42° -5° (1986) 76° (1954) 0.08" 0.1"
Feb 16 23° 42° -7° (1958) 73° (1976) 0.08" 0.1"
Feb 17 23° 43° -7° (1958) 71° (1976) 0.08" 0.2"
Feb 18 24° 43° -5° (1993) 70° (1971) 0.08" 0.1"
Feb 19 24° 43° -5° (1979) 72° (1991) 0.08" 0.1"
Feb 20 24° 44° 1° (1978) 65° (1981) 0.08" 0.2"
Feb 21 25° 44° -1° (1963) 74° (1996) 0.08" 0.1"
Feb 22 25° 44° -5° (1978) 70° (1991) 0.09" 0.1"
Feb 23 25° 45° 2° (1968) 73° (1995) 0.08" 0.1"
Feb 24 26° 45° 4° (1967) 75° (1956) 0.09" 0.1"
Feb 25 26° 45° -2° (1967) 76° (2000) 0.08" 0.1"
Feb 26 26° 46° -2° (2003) 73° (1995) 0.09" 0.1"
Feb 27 27° 46° -3° (1993) 74° (1996) 0.08" 0.1"
Feb 28 27° 46° -1° (1993) 75° (1972) 0.09" 0.1"
Feb 29 27° 47° 10° (1960) 80° (1972) 0.09" NA
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