Mercer, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -25° (1994) 69° (1989) 1.41" NA
February 17° 35° -30° (1905) 72° (1921) 1.61" NA
March 27° 48° -15° (1962) 94° (1928) 2.46" NA
April 38° 62° 10° (1982) 93° (1930) 3.75" NA
May 49° 72° 23° (2005) 103° (1934) 4.36" NA
June 59° 81° 36° (1972) 104° (1936) 4.82" NA
July 63° 84° 44° (1975) 113° (1936) 3.94" NA
August 61° 82° 38° (1915) 106° (1936) 4.11" NA
September 52° 75° 24° (1942) 102° (1953) 3.43" NA
October 41° 63° 9° (1925) 92° (1953) 3.02" NA
November 29° 48° -6° (1977) 81° (1902) 2.36" NA
December 18° 33° -22° (1924) 70° (1998) 2.09" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 45° 69° 29° (1958) 89° (1994) 0.09" NA
Oct 2 45° 69° 24° (1974) 92° (1953) 0.1" NA
Oct 3 45° 68° 27° (2003) 90° (1922) 0.1" NA
Oct 4 44° 68° 25° (1935) 91° (1997) 0.09" NA
Oct 5 44° 67° 28° (1980) 89° (1922) 0.1" NA
Oct 6 44° 67° 26° (1935) 91° (1963) 0.1" NA
Oct 7 43° 67° 26° (2000) 90° (1939) 0.09" NA
Oct 8 43° 66° 24° (1952) 88° (1938) 0.1" NA
Oct 9 43° 66° 24° (1915) 89° (1954) 0.1" NA
Oct 10 42° 65° 24° (1925) 89° (1930) 0.09" NA
Oct 11 42° 65° 24° (1987) 87° (1962) 0.1" NA
Oct 12 42° 65° 25° (1917) 86° (1956) 0.09" NA
Oct 13 41° 64° 20° (1909) 88° (1975) 0.1" NA
Oct 14 41° 64° 24° (1909) 86° (1947) 0.09" NA
Oct 15 41° 63° 25° (1937) 89° (1963) 0.09" NA
Oct 16 41° 63° 27° (1975) 87° (1950) 0.09" NA
Oct 17 40° 63° 25° (1943) 88° (1950) 0.1" NA
Oct 18 40° 62° 20° (1952) 88° (1950) 0.1" NA
Oct 19 40° 62° 17° (1972) 85° (1953) 0.1" NA
Oct 20 39° 62° 20° (1960) 85° (1953) 0.1" NA
Oct 21 39° 61° 19° (1930) 85° (1979) 0.1" NA
Oct 22 39° 61° 23° (1930) 89° (1902) 0.1" NA
Oct 23 39° 60° 23° (1969) 84° (1963) 0.1" NA
Oct 24 38° 60° 21° (1981) 81° (1963) 0.1" NA
Oct 25 38° 59° 24° (1933) 83° (1939) 0.09" NA
Oct 26 38° 59° 18° (1942) 85° (1927) 0.1" NA
Oct 27 37° 59° 20° (1925) 85° (1927) 0.1" NA
Oct 28 37° 58° 9° (1925) 83° (1927) 0.1" NA
Oct 29 37° 58° 10° (1925) 84° (1937) 0.1" NA
Oct 30 36° 57° 11° (1925) 86° (1950) 0.11" NA
Oct 31 36° 57° 16° (1925) 87° (1950) 0.1" NA
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