Lanark, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 30° -31° (1910) 61° (2002) 1.48" 9.6"
February 16° 36° -30° (1996) 70° (2000) 1.77" 6.2"
March 26° 47° -16° (1962) 85° (1986) 2.61" 3.5"
April 37° 61° -2° (1982) 92° (1930) 3.7" 0.7"
May 47° 72° 20° (2005) 104° (1934) 4.42" 0"
June 57° 81° 31° (1988) 104° (1934) 4.98" 0"
July 61° 85° 35° (1904) 108° (1936) 4.52" 0"
August 59° 83° 32° (1986) 103° (1936) 4.5" 0"
September 49° 76° 23° (1983) 99° (1939) 3.46" 0"
October 38° 63° 4° (1925) 91° (1997) 3.14" 0.1"
November 29° 48° -15° (1976) 79° (2000) 2.9" 1.2"
December 16° 34° -28° (1914) 69° (1998) 2.24" 8.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 56° 81° 35° (1901) 97° (1953) 0.12" 0"
Sep 2 55° 81° 36° (1909) 97° (1913) 0.12" 0"
Sep 3 55° 80° 35° (1908) 95° (1925) 0.11" 0"
Sep 4 55° 80° 34° (1974) 99° (1925) 0.12" 0"
Sep 5 54° 80° 32° (1988) 95° (1912) 0.11" 0"
Sep 6 54° 80° 27° (1988) 99° (1922) 0.12" 0"
Sep 7 53° 79° 27° (1988) 99° (1939) 0.12" 0"
Sep 8 53° 79° 30° (1988) 98° (1922) 0.11" 0"
Sep 9 53° 79° 33° (1986) 96° (1912) 0.12" 0"
Sep 10 52° 78° 33° (1910) 95° (1931) 0.12" 0"
Sep 11 52° 78° 34° (1993) 94° (1931) 0.11" 0"
Sep 12 51° 77° 29° (1902) 94° (1908) 0.11" 0"
Sep 13 51° 77° 30° (1902) 95° (1939) 0.12" 0"
Sep 14 50° 77° 32° (1975) 97° (1939) 0.11" 0"
Sep 15 50° 76° 31° (2007) 97° (1939) 0.11" 0"
Sep 16 49° 76° 31° (1989) 95° (1931) 0.11" 0"
Sep 17 49° 75° 32° (1937) 92° (1925) 0.11" 0"
Sep 18 48° 75° 26° (1903) 94° (1988) 0.12" 0"
Sep 19 48° 75° 29° (1901) 92° (1908) 0.12" 0"
Sep 20 47° 74° 29° (1956) 93° (1920) 0.12" 0"
Sep 21 47° 74° 30° (1991) 93° (1908) 0.12" 0"
Sep 22 46° 73° 26° (1976) 90° (1937) 0.12" 0"
Sep 23 46° 73° 23° (1983) 90° (1937) 0.12" 0"
Sep 24 45° 73° 20° (1989) 91° (1920) 0.12" 0"
Sep 25 45° 72° 24° (1989) 94° (1920) 0.11" 0"
Sep 26 44° 72° 24° (1928) 88° (1920) 0.12" 0"
Sep 27 44° 71° 22° (1989) 90° (1998) 0.12" 0"
Sep 28 44° 71° 23° (1989) 90° (1939) 0.11" 0"
Sep 29 43° 70° 26° (1908) 94° (1953) 0.11" 0"
Sep 30 43° 70° 25° (1993) 90° (1971) 0.1" 0"
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