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
Oct 1 49° 74° 31° (1963) 94° (1919) 0.11" 0"
Oct 2 48° 74° 30° (1985) 97° (1953) 0.12" 0"
Oct 3 48° 73° 29° (1952) 94° (1953) 0.12" 0"
Oct 4 48° 73° 27° (1987) 93° (1922) 0.13" 0"
Oct 5 47° 73° 29° (1968) 92° (1938) 0.12" 0"
Oct 6 47° 72° 29° (1935) 92° (1939) 0.13" 0"
Oct 7 47° 72° 24° (1964) 93° (1939) 0.13" 0"
Oct 8 46° 71° 24° (1987) 94° (1939) 0.13" 0"
Oct 9 46° 71° 24° (1917) 94° (1939) 0.13" 0"
Oct 10 46° 71° 26° (1917) 89° (1928) 0.12" 0"
Oct 11 45° 70° 27° (1964) 92° (1963) 0.13" 0"
Oct 12 45° 70° 23° (1987) 89° (1928) 0.13" 0"
Oct 13 45° 69° 20° (1917) 93° (1928) 0.13" 0"
Oct 14 44° 69° 24° (1917) 86° (1908) 0.13" 0"
Oct 15 44° 69° 24° (1937) 90° (1938) 0.13" 0"
Oct 16 44° 68° 26° (1991) 89° (1938) 0.13" 0"
Oct 17 44° 68° 28° (1943) 88° (1920) 0.13" 0"
Oct 18 43° 68° 23° (1948) 90° (1920) 0.14" 0"
Oct 19 43° 67° 24° (1992) 90° (1953) 0.13" 0"
Oct 20 43° 67° 21° (1930) 90° (1963) 0.14" 0"
Oct 21 43° 66° 19° (1952) 90° (1953) 0.13" 0"
Oct 22 42° 66° 20° (1952) 90° (1953) 0.13" 0"
Oct 23 42° 66° 24° (1937) 87° (1920) 0.14" 0"
Oct 24 42° 65° 18° (1981) 85° (1934) 0.12" 0"
Oct 25 41° 65° 21° (1981) 87° (1940) 0.13" 0"
Oct 26 41° 65° 22° (1942) 89° (1940) 0.12" 0"
Oct 27 41° 64° 24° (1914) 86° (1940) 0.13" 0"
Oct 28 41° 64° 19° (1976) 87° (1927) 0.13" 0"
Oct 29 40° 63° 17° (1952) 84° (1946) 0.13" 0"
Oct 30 40° 63° 21° (1925) 87° (1950) 0.13" 0"
Oct 31 40° 62° 22° (1925) 85° (1950) 0.14" 0"
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