Helena, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 19° 36° -24° (1994) 75° (1943) 2.84" NA
February 23° 42° -25° (1951) 78° (1972) 2.73" NA
March 32° 54° -15° (1978) 89° (1910) 4.35" NA
April 42° 65° 21° (1994) 91° (1930) 4.38" NA
May 52° 75° 29° (1971) 98° (1911) 4.76" NA
June 62° 84° 36° (1917) 106° (1954) 4.07" NA
July 66° 88° 45° (1937) 112° (1936) 4.13" NA
August 63° 86° 41° (1964) 109° (1943) 3.55" NA
September 55° 80° 27° (1928) 106° (1953) 3.09" NA
October 44° 69° 17° (1952) 97° (1953) 3.34" NA
November 34° 54° -2° (1929) 89° (1923) 4.39" NA
December 24° 41° -19° (1989) 74° (1982) 3.65" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 49° 75° 31° (1963) 94° (1919) 0.1" NA
Oct 2 49° 75° 30° (1985) 97° (1953) 0.1" NA
Oct 3 48° 74° 29° (1952) 94° (1953) 0.1" NA
Oct 4 48° 74° 27° (1987) 93° (1922) 0.1" NA
Oct 5 48° 73° 29° (1968) 92° (1938) 0.1" NA
Oct 6 47° 73° 29° (1935) 92° (1939) 0.1" NA
Oct 7 47° 73° 24° (1964) 93° (1939) 0.1" NA
Oct 8 46° 72° 24° (1987) 94° (1939) 0.1" NA
Oct 9 46° 72° 24° (1917) 94° (1939) 0.1" NA
Oct 10 46° 71° 26° (1917) 89° (1928) 0.1" NA
Oct 11 45° 71° 27° (1964) 92° (1963) 0.1" NA
Oct 12 45° 71° 23° (1987) 89° (1928) 0.1" NA
Oct 13 45° 70° 20° (1917) 93° (1928) 0.1" NA
Oct 14 44° 70° 24° (1917) 86° (1908) 0.1" NA
Oct 15 44° 69° 24° (1937) 90° (1938) 0.1" NA
Oct 16 43° 69° 26° (1991) 89° (1938) 0.1" NA
Oct 17 43° 68° 28° (1943) 88° (1920) 0.1" NA
Oct 18 43° 68° 23° (1948) 90° (1920) 0.11" NA
Oct 19 42° 67° 24° (1992) 90° (1953) 0.11" NA
Oct 20 42° 67° 21° (1930) 90° (1963) 0.11" NA
Oct 21 42° 67° 19° (1952) 90° (1953) 0.11" NA
Oct 22 41° 66° 20° (1952) 90° (1953) 0.11" NA
Oct 23 41° 66° 24° (1937) 87° (1920) 0.11" NA
Oct 24 41° 65° 18° (1981) 85° (1934) 0.12" NA
Oct 25 40° 65° 21° (1981) 87° (1940) 0.12" NA
Oct 26 40° 64° 22° (1942) 89° (1940) 0.12" NA
Oct 27 40° 64° 24° (1914) 86° (1940) 0.12" NA
Oct 28 40° 63° 19° (1976) 87° (1927) 0.12" NA
Oct 29 39° 62° 17° (1952) 84° (1946) 0.12" NA
Oct 30 39° 62° 21° (1925) 87° (1950) 0.13" NA
Oct 31 39° 61° 22° (1925) 85° (1950) 0.13" NA
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