Decorra, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 15° 33° -23° (1982) 70° (1950) 1.49" 7"
February 19° 38° -30° (1905) 76° (1930) 1.83" 5.5"
March 29° 50° -13° (1960) 88° (1910) 2.66" 3.8"
April 41° 63° 9° (1975) 94° (1930) 3.9" 1.1"
May 51° 73° 26° (1906) 105° (1934) 4.8" 0"
June 61° 82° 37° (1903) 108° (1934) 4.75" 0"
July 65° 86° 42° (1975) 110° (1936) 4.64" 0"
August 63° 85° 36° (1915) 113° (1934) 3.73" 0"
September 53° 77° 25° (1942) 103° (1913) 3.79" 0"
October 42° 65° 1° (1925) 96° (2006) 3.09" 0.1"
November 31° 51° -3° (1929) 83° (1950) 2.94" 1.8"
December 19° 37° -26° (1924) 72° (1998) 2.28" 5.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 46° 71° 28° (1920) 90° (1994) 0.11" NA
Oct 2 46° 71° 25° (1974) 93° (1953) 0.1" NA
Oct 3 46° 70° 25° (1974) 95° (2006) 0.1" NA
Oct 4 45° 70° 25° (1935) 96° (2006) 0.11" NA
Oct 5 45° 70° 26° (1988) 89° (1912) 0.1" NA
Oct 6 44° 69° 22° (1952) 94° (1963) 0.1" NA
Oct 7 44° 69° 24° (1952) 94° (1939) 0.11" NA
Oct 8 44° 68° 24° (2000) 90° (2007) 0.1" NA
Oct 9 43° 68° 20° (1915) 90° (2007) 0.1" NA
Oct 10 43° 68° 25° (1925) 88° (1930) 0.1" NA
Oct 11 43° 67° 20° (1906) 89° (1962) 0.1" NA
Oct 12 43° 67° 23° (1905) 89° (1962) 0.1" NA
Oct 13 42° 67° 17° (1917) 88° (1975) 0.1" NA
Oct 14 42° 66° 23° (1909) 87° (1938) 0.1" NA
Oct 15 42° 66° 26° (1937) 91° (1963) 0.09" NA
Oct 16 41° 65° 27° (1977) 86° (1950) 0.1" NA
Oct 17 41° 65° 24° (1943) 88° (1950) 0.09" NA
Oct 18 41° 65° 22° (1948) 87° (1950) 0.1" NA
Oct 19 41° 64° 20° (1972) 86° (1950) 0.1" NA
Oct 20 40° 64° 20° (1960) 87° (1963) 0.1" NA
Oct 21 40° 64° 22° (1930) 87° (1979) 0.1" NA
Oct 22 40° 63° 24° (1982) 86° (1963) 0.09" NA
Oct 23 40° 63° 22° (2006) 85° (1963) 0.1" NA
Oct 24 39° 62° 18° (1981) 82° (1927) 0.1" NA
Oct 25 39° 62° 22° (1968) 84° (1939) 0.09" NA
Oct 26 39° 61° 18° (1942) 87° (1940) 0.1" NA
Oct 27 38° 61° 19° (1988) 85° (1927) 0.1" NA
Oct 28 38° 61° 10° (1925) 86° (1927) 0.1" NA
Oct 29 38° 60° 13° (1925) 84° (1937) 0.1" NA
Oct 30 37° 60° 1° (1925) 88° (1950) 0.1" NA
Oct 31 37° 59° 11° (1925) 86° (1950) 0.1" NA
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