Helena, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 20° 38° -24° (1994) 75° (1943) 3.05" 4"
February 24° 43° -25° (1951) 78° (1972) 2.83" 3.3"
March 32° 54° -15° (1978) 89° (1910) 4.34" 1.1"
April 43° 66° 21° (1994) 91° (1930) 4.33" 0.1"
May 53° 75° 29° (1971) 98° (1911) 5.83" 0"
June 63° 84° 36° (1917) 106° (1954) 4.19" 0"
July 66° 87° 45° (1937) 112° (1936) 4.33" 0"
August 64° 87° 41° (1964) 109° (1943) 3.2" 0"
September 55° 80° 27° (1928) 106° (1953) 3.07" 0"
October 44° 68° 17° (1952) 97° (1953) 3.99" 0"
November 34° 55° -2° (1929) 89° (1923) 4.48" 0.3"
December 24° 41° -19° (1989) 74° (1982) 3.88" 2.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 65° 87° 46° (1971) 101° (1913) 0.12" 0"
Aug 2 65° 87° 47° (1920) 102° (1901) 0.1" 0"
Aug 3 65° 87° 47° (1920) 107° (1947) 0.12" 0"
Aug 4 65° 87° 50° (1950) 106° (1947) 0.1" 0"
Aug 5 65° 87° 51° (1950) 106° (1918) 0.1" 0"
Aug 6 65° 87° 51° (1957) 106° (1930) 0.1" 0"
Aug 7 65° 87° 48° (1990) 107° (1930) 0.1" 0"
Aug 8 65° 87° 48° (1989) 109° (1930) 0.1" 0"
Aug 9 65° 87° 49° (1989) 109° (1930) 0.1" 0"
Aug 10 65° 87° 51° (1972) 101° (1944) 0.11" 0"
Aug 11 65° 87° 52° (1919) 104° (1941) 0.1" 0"
Aug 12 65° 87° 48° (1967) 102° (1918) 0.11" 0"
Aug 13 65° 87° 41° (1964) 102° (1936) 0.11" 0"
Aug 14 64° 87° 45° (1963) 100° (1918) 0.11" 0"
Aug 15 64° 87° 44° (1963) 101° (1936) 0.11" 0"
Aug 16 64° 87° 45° (1963) 102° (1988) 0.1" 0"
Aug 17 64° 87° 49° (2004) 105° (1936) 0.11" 0"
Aug 18 64° 87° 48° (1963) 109° (1936) 0.11" 0"
Aug 19 64° 87° 49° (1943) 108° (1936) 0.11" 0"
Aug 20 64° 87° 49° (1943) 104° (1936) 0.1" 0"
Aug 21 64° 87° 46° (1950) 106° (1936) 0.1" 0"
Aug 22 64° 87° 46° (1950) 106° (1936) 0.1" 0"
Aug 23 63° 86° 48° (1920) 101° (1936) 0.09" 0"
Aug 24 63° 86° 48° (1920) 106° (1943) 0.09" 0"
Aug 25 63° 86° 47° (1917) 105° (1943) 0.1" 0"
Aug 26 63° 86° 44° (1917) 109° (1943) 0.09" 0"
Aug 27 63° 86° 48° (1968) 101° (1936) 0.1" 0"
Aug 28 62° 86° 47° (1968) 105° (1936) 0.11" 0"
Aug 29 62° 86° 44° (1965) 101° (1909) 0.1" 0"
Aug 30 62° 86° 44° (1946) 99° (1943) 0.1" 0"
Aug 31 62° 85° 41° (1915) 102° (1943) 0.1" 0"
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