Thomas, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 29° -27° (1985) 73° (1942) 1.29" 9.9"
February 17° 34° -26° (1905) 70° (2000) 1.64" 7.7"
March 28° 47° -13° (1962) 87° (1986) 2.15" 3.3"
April 39° 61° 6° (1982) 93° (1986) 3.18" 0.6"
May 50° 72° 24° (2005) 105° (1934) 4.36" 0"
June 59° 81° 37° (1945) 106° (1934) 4.56" 0"
July 63° 84° 44° (1904) 111° (1936) 3.85" 0"
August 61° 82° 36° (1923) 105° (1936) 4.44" 0"
September 52° 75° 24° (1942) 101° (1953) 3.12" 0"
October 40° 63° 10° (1925) 92° (1963) 2.89" 0.1"
November 30° 48° -8° (1977) 81° (1950) 2.44" 1.4"
December 17° 34° -23° (1924) 68° (1998) 1.96" 9.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 22° 39° 9° (1960) 62° (1962) 0.08" 0.2"
Dec 2 22° 39° -4° (1976) 65° (1962) 0.08" 0.2"
Dec 3 21° 38° -5° (1919) 65° (1951) 0.08" 0.2"
Dec 4 21° 38° -5° (1991) 66° (1998) 0.08" 0.2"
Dec 5 21° 37° -4° (1991) 68° (1998) 0.08" 0.2"
Dec 6 20° 37° -7° (1977) 65° (2001) 0.08" 0.2"
Dec 7 20° 36° -11° (1976) 66° (1916) 0.08" 0.3"
Dec 8 19° 36° -10° (2005) 65° (1946) 0.08" 0.2"
Dec 9 19° 35° -14° (1958) 63° (1946) 0.07" 0.3"
Dec 10 18° 35° -18° (1919) 58° (1911) 0.08" 0.2"
Dec 11 18° 35° -11° (1972) 62° (1949) 0.07" 0.3"
Dec 12 18° 34° -11° (1962) 58° (1949) 0.07" 0.3"
Dec 13 17° 34° -19° (1903) 62° (1991) 0.07" 0.3"
Dec 14 17° 34° -11° (1901) 60° (1975) 0.07" 0.4"
Dec 15 17° 33° -18° (1989) 60° (1971) 0.06" 0.3"
Dec 16 16° 33° -15° (1932) 58° (1939) 0.06" 0.3"
Dec 17 16° 33° -14° (1989) 58° (1984) 0.06" 0.3"
Dec 18 16° 32° -15° (1985) 60° (1939) 0.06" 0.3"
Dec 19 16° 32° -21° (1983) 55° (1918) 0.05" 0.3"
Dec 20 15° 32° -20° (1983) 59° (1949) 0.06" 0.4"
Dec 21 15° 32° -21° (1963) 59° (1967) 0.05" 0.3"
Dec 22 15° 31° -22° (1989) 56° (1957) 0.05" 0.4"
Dec 23 15° 31° -22° (1989) 60° (1979) 0.05" 0.3"
Dec 24 14° 31° -22° (1983) 60° (1982) 0.05" 0.3"
Dec 25 14° 31° -20° (1983) 58° (1982) 0.05" 0.4"
Dec 26 14° 31° -21° (1914) 55° (1936) 0.05" 0.3"
Dec 27 14° 31° -15° (1933) 61° (1982) 0.05" 0.4"
Dec 28 14° 30° -23° (1924) 59° (1946) 0.05" 0.3"
Dec 29 14° 30° -12° (1917) 65° (1984) 0.05" 0.4"
Dec 30 13° 30° -12° (1909) 60° (1936) 0.04" 0.3"
Dec 31 13° 30° -16° (1976) 59° (1965) 0.05" 0.4"
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