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
Mar 1 27° 47° 2° (1960) 73° (1976) 0.12" NA
Mar 2 27° 48° 0° (1980) 76° (1992) 0.12" NA
Mar 3 27° 48° -6° (1943) 76° (1983) 0.12" NA
Mar 4 28° 49° -5° (1978) 79° (1983) 0.13" NA
Mar 5 28° 49° -15° (1978) 75° (1910) 0.13" NA
Mar 6 28° 50° -5° (1960) 77° (1918) 0.13" NA
Mar 7 29° 50° 3° (1943) 80° (1925) 0.13" NA
Mar 8 29° 50° -2° (1943) 80° (1974) 0.13" NA
Mar 9 29° 51° 8° (1932) 81° (1925) 0.13" NA
Mar 10 30° 51° 4° (1934) 80° (1990) 0.14" NA
Mar 11 30° 52° 11° (1979) 77° (1911) 0.14" NA
Mar 12 30° 52° 3° (1948) 78° (1972) 0.14" NA
Mar 13 31° 52° 5° (1968) 79° (1933) 0.14" NA
Mar 14 31° 53° 13° (1993) 80° (2007) 0.14" NA
Mar 15 31° 53° 16° (1937) 78° (1921) 0.14" NA
Mar 16 32° 54° 13° (1970) 84° (1945) 0.14" NA
Mar 17 32° 54° 8° (1906) 76° (1940) 0.14" NA
Mar 18 32° 54° 11° (1906) 76° (1910) 0.14" NA
Mar 19 33° 55° 8° (1923) 82° (1907) 0.15" NA
Mar 20 33° 55° 10° (1914) 81° (1948) 0.15" NA
Mar 21 34° 56° 10° (1986) 86° (1907) 0.15" NA
Mar 22 34° 56° 17° (1996) 87° (1907) 0.15" NA
Mar 23 34° 56° 15° (1960) 88° (1910) 0.15" NA
Mar 24 35° 57° -2° (1974) 89° (1910) 0.15" NA
Mar 25 35° 57° 11° (1974) 82° (1907) 0.15" NA
Mar 26 35° 57° 6° (1955) 85° (1907) 0.15" NA
Mar 27 36° 58° 10° (1955) 87° (1910) 0.15" NA
Mar 28 36° 58° 18° (2001) 86° (1910) 0.15" NA
Mar 29 36° 59° 22° (1955) 82° (1986) 0.15" NA
Mar 30 37° 59° 19° (1964) 84° (1986) 0.15" NA
Mar 31 37° 59° 15° (1969) 85° (1981) 0.15" NA
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