Mount Vernon, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 19° 37° -21° (1994) 75° (1943) 2.45" NA
February 23° 43° -20° (1905) 79° (1972) 2.69" NA
March 33° 54° -10° (1978) 92° (1907) 3.98" NA
April 43° 65° 17° (1923) 91° (1946) 4.44" NA
May 53° 75° 29° (1904) 99° (1941) 4.58" NA
June 62° 84° 36° (1924) 105° (1931) 3.61" NA
July 66° 88° 46° (1947) 114° (1936) 3.57" NA
August 64° 86° 42° (1986) 111° (1936) 3.27" NA
September 56° 79° 28° (1928) 105° (1939) 3.11" NA
October 43° 68° 18° (1981) 96° (1938) 2.92" NA
November 34° 54° -5° (1929) 86° (1938) 4.37" NA
December 24° 42° -19° (1989) 78° (1970) 3.2" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 20° 38° -9° (1968) 68° (1952) 0.08" NA
Jan 2 20° 37° -5° (1928) 63° (1916) 0.08" NA
Jan 3 19° 37° -3° (1928) 67° (1950) 0.08" NA
Jan 4 19° 37° 0° (1959) 68° (1939) 0.08" NA
Jan 5 19° 37° -10° (1924) 66° (1997) 0.08" NA
Jan 6 19° 37° -8° (1999) 65° (1907) 0.08" NA
Jan 7 19° 37° -18° (1912) 66° (1965) 0.08" NA
Jan 8 19° 37° -14° (1912) 68° (1965) 0.08" NA
Jan 9 19° 37° -2° (1970) 65° (1963) 0.08" NA
Jan 10 19° 37° -13° (1982) 65° (1975) 0.08" NA
Jan 11 19° 36° -16° (1977) 63° (1975) 0.08" NA
Jan 12 19° 36° -18° (1918) 70° (1911) 0.08" NA
Jan 13 18° 36° -13° (1912) 66° (2005) 0.08" NA
Jan 14 18° 36° -11° (1997) 66° (1928) 0.07" NA
Jan 15 18° 36° -13° (1979) 68° (1949) 0.07" NA
Jan 16 18° 36° -12° (1912) 69° (1928) 0.07" NA
Jan 17 18° 36° -20° (1977) 69° (1952) 0.08" NA
Jan 18 18° 37° -20° (1930) 66° (1951) 0.08" NA
Jan 19 18° 37° -21° (1994) 68° (1907) 0.08" NA
Jan 20 18° 37° -17° (1985) 72° (1906) 0.08" NA
Jan 21 18° 37° -19° (1984) 69° (1906) 0.08" NA
Jan 22 19° 37° -11° (1930) 67° (1986) 0.08" NA
Jan 23 19° 37° -14° (1930) 70° (1967) 0.08" NA
Jan 24 19° 37° -11° (1963) 75° (1943) 0.08" NA
Jan 25 19° 37° -8° (1905) 74° (1950) 0.08" NA
Jan 26 19° 37° -7° (1940) 71° (1950) 0.08" NA
Jan 27 19° 38° -11° (1936) 69° (1944) 0.08" NA
Jan 28 19° 38° -14° (1963) 69° (1970) 0.08" NA
Jan 29 19° 38° -10° (1977) 68° (1914) 0.08" NA
Jan 30 19° 38° -10° (1936) 68° (2002) 0.08" NA
Jan 31 20° 39° -11° (1936) 67° (1917) 0.08" NA
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