Lanark, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 29° -31° (1910) 61° (2002) 1.43" 8.8"
February 13° 35° -30° (1996) 70° (2000) 1.52" 6.9"
March 25° 47° -16° (1962) 85° (1986) 2.63" 5.3"
April 35° 60° -2° (1982) 92° (1930) 3.67" 1.9"
May 46° 72° 20° (2005) 104° (1934) 4.34" 0"
June 54° 82° 31° (1988) 104° (1934) 4.77" 0"
July 59° 85° 35° (1904) 108° (1936) 3.83" 0"
August 56° 83° 32° (1986) 103° (1936) 4.54" 0"
September 47° 76° 23° (1983) 99° (1939) 3.48" 0"
October 36° 64° 4° (1925) 91° (1997) 2.73" 0.1"
November 26° 47° -15° (1976) 79° (2000) 2.84" 2.2"
December 14° 34° -28° (1914) 69° (1998) 2.02" 7.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 30° 54° 11° (1989) 83° (1946) 0.11" NA
Apr 2 30° 54° 15° (1993) 83° (2003) 0.11" NA
Apr 3 31° 55° 13° (1987) 82° (1981) 0.11" NA
Apr 4 31° 55° 11° (1936) 82° (1929) 0.11" NA
Apr 5 31° 56° 15° (1995) 81° (1929) 0.11" NA
Apr 6 31° 56° 4° (1982) 85° (1991) 0.11" NA
Apr 7 32° 57° -2° (1982) 84° (1991) 0.12" NA
Apr 8 32° 57° 12° (1972) 84° (1931) 0.12" NA
Apr 9 32° 57° 15° (2003) 78° (1905) 0.12" NA
Apr 10 33° 58° 12° (1909) 92° (1930) 0.12" NA
Apr 11 33° 58° 12° (1989) 88° (1930) 0.12" NA
Apr 12 33° 59° 16° (1989) 83° (1941) 0.12" NA
Apr 13 34° 59° 10° (1989) 81° (1931) 0.12" NA
Apr 14 34° 60° 12° (1989) 85° (2006) 0.12" NA
Apr 15 34° 60° 15° (1928) 86° (2003) 0.12" NA
Apr 16 35° 61° 18° (1983) 88° (2002) 0.12" NA
Apr 17 35° 61° 16° (1904) 88° (2002) 0.12" NA
Apr 18 35° 61° 15° (1983) 85° (1977) 0.13" NA
Apr 19 36° 62° 13° (1988) 90° (2002) 0.13" NA
Apr 20 36° 62° 16° (1988) 85° (1985) 0.13" NA
Apr 21 36° 63° 19° (1988) 90° (1987) 0.13" NA
Apr 22 37° 63° 14° (1986) 86° (1925) 0.13" NA
Apr 23 37° 63° 19° (1986) 91° (1980) 0.13" NA
Apr 24 37° 64° 18° (1910) 87° (1915) 0.13" NA
Apr 25 38° 64° 19° (1934) 86° (1915) 0.13" NA
Apr 26 38° 65° 21° (1907) 91° (1986) 0.13" NA
Apr 27 39° 65° 23° (1904) 87° (1986) 0.13" NA
Apr 28 39° 65° 22° (1988) 89° (1915) 0.13" NA
Apr 29 39° 66° 23° (1977) 91° (1952) 0.13" NA
Apr 30 40° 66° 25° (1989) 91° (1942) 0.13" NA
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