Thomson, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -23° (1999) 62° (1981) 1.38" 7.4"
February 17° 35° -26° (1996) 68° (1976) 1.55" 5.3"
March 28° 46° -14° (1962) 82° (1986) 2.36" 4.7"
April 40° 60° 13° (1982) 91° (1980) 3.01" 0.9"
May 50° 72° 30° (2005) 92° (1991) 3.69" 0"
June 61° 81° 40° (1993) 98° (1988) 4.16" 0"
July 65° 85° 46° (2000) 102° (2005) 3.3" 0"
August 63° 83° 42° (1999) 102° (1988) 4.33" 0"
September 54° 76° 30° (1991) 96° (1985) 2.83" 0"
October 42° 63° 13° (1952) 90° (2006) 2.82" 0"
November 31° 48° -5° (1977) 82° (2000) 2.47" 1"
December 19° 34° -22° (2000) 66° (2001) 1.77" 6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Mar 1 22° 39° -14° (1962) 59° (2004) 0.07" NA
Mar 2 23° 40° -4° (1962) 67° (1992) 0.07" NA
Mar 3 23° 40° -3° (1980) 69° (1983) 0.07" NA
Mar 4 23° 41° -5° (1978) 72° (1974) 0.07" NA
Mar 5 24° 41° -7° (1978) 68° (1983) 0.07" NA
Mar 6 24° 42° -11° (1960) 70° (2000) 0.07" NA
Mar 7 25° 42° -1° (1960) 72° (2000) 0.07" NA
Mar 8 25° 42° -6° (1960) 73° (2000) 0.07" NA
Mar 9 25° 43° -1° (1978) 70° (1977) 0.07" NA
Mar 10 26° 43° -2° (1996) 69° (1955) 0.07" NA
Mar 11 26° 44° 2° (2003) 69° (1972) 0.07" NA
Mar 12 26° 44° -6° (1960) 70° (1990) 0.07" NA
Mar 13 27° 45° 6° (1975) 78° (1990) 0.08" NA
Mar 14 27° 45° -4° (1960) 72° (1990) 0.06" NA
Mar 15 28° 46° 7° (1960) 68° (1990) 0.07" NA
Mar 16 28° 46° 8° (1979) 66° (1977) 0.08" NA
Mar 17 28° 47° 13° (1959) 74° (1966) 0.07" NA
Mar 18 29° 47° 7° (1960) 73° (2009) 0.08" NA
Mar 19 29° 47° 7° (1965) 68° (1969) 0.08" NA
Mar 20 29° 48° 9° (1965) 75° (1976) 0.07" NA
Mar 21 30° 48° 7° (1960) 76° (1953) 0.09" NA
Mar 22 30° 49° 15° (1951) 70° (1991) 0.08" NA
Mar 23 31° 49° 8° (1960) 72° (1988) 0.08" NA
Mar 24 31° 50° 4° (1974) 75° (1994) 0.07" NA
Mar 25 31° 50° 4° (1960) 71° (1988) 0.09" NA
Mar 26 32° 51° 9° (1960) 78° (2007) 0.08" NA
Mar 27 32° 51° 9° (1965) 79° (1989) 0.09" NA
Mar 28 32° 52° 13° (1996) 76° (1968) 0.09" NA
Mar 29 33° 52° 11° (1969) 75° (1986) 0.08" NA
Mar 30 33° 53° 10° (1969) 82° (1986) 0.09" NA
Mar 31 34° 53° 13° (1969) 75° (1971) 0.09" NA
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