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
May 1 45° 67° 32° (1978) 84° (1951) 0.12" NA
May 2 46° 67° 31° (1970) 86° (1959) 0.12" NA
May 3 46° 68° 30° (2005) 87° (1949) 0.12" NA
May 4 46° 68° 31° (2005) 89° (1959) 0.11" NA
May 5 47° 68° 31° (2005) 89° (1949) 0.12" NA
May 6 47° 69° 30° (1989) 87° (1980) 0.11" NA
May 7 47° 69° 31° (1989) 85° (1965) 0.11" NA
May 8 48° 69° 35° (1960) 88° (1963) 0.11" NA
May 9 48° 69° 30° (1966) 89° (1963) 0.11" NA
May 10 48° 70° 32° (1966) 86° (1979) 0.12" NA
May 11 49° 70° 32° (1966) 85° (1979) 0.11" NA
May 12 49° 70° 34° (1971) 86° (1956) 0.13" NA
May 13 49° 71° 37° (1953) 91° (1956) 0.12" NA
May 14 50° 71° 37° (2000) 88° (1991) 0.12" NA
May 15 50° 71° 37° (2000) 88° (1998) 0.12" NA
May 16 50° 72° 36° (1961) 88° (2001) 0.12" NA
May 17 51° 72° 38° (2005) 88° (1971) 0.12" NA
May 18 51° 72° 34° (1952) 90° (1962) 0.13" NA
May 19 51° 72° 34° (2000) 90° (1996) 0.12" NA
May 20 52° 73° 40° (2000) 89° (1975) 0.13" NA
May 21 52° 73° 37° (2002) 89° (1972) 0.12" NA
May 22 52° 73° 37° (2002) 90° (1962) 0.13" NA
May 23 53° 74° 38° (1963) 89° (1972) 0.12" NA
May 24 53° 74° 40° (1992) 92° (1975) 0.12" NA
May 25 53° 74° 39° (1992) 92° (1967) 0.12" NA
May 26 54° 75° 36° (1961) 90° (1967) 0.12" NA
May 27 54° 75° 38° (2001) 92° (1978) 0.12" NA
May 28 54° 75° 41° (1992) 90° (1978) 0.11" NA
May 29 55° 76° 38° (2001) 92° (1991) 0.11" NA
May 30 55° 76° 43° (1984) 90° (1953) 0.12" NA
May 31 55° 76° 40° (2001) 91° (1988) 0.13" NA
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