Alta, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -10° -1° -32.8° (1884) 21.7° (1909) 1.5" 8.2"
February -7° -32.2° (1905) 23.3° (1932) 1.67" 5.6"
March -1° -23.9° (1943) 31.1° (1907) 2.83" 3.2"
April 17° -10.6° (1982) 33.3° (1986) 3.56" 1"
May 11° 23° -3.9° (1966) 40° (1934) 4.17" 0"
June 16° 28° 3.9° (1993) 40.6° (1988) 3.84" 0"
July 18° 30° 7.8° (1911) 45° (1936) 4.02" 0"
August 17° 29° 5° (1986) 41.1° (1936) 3.16" 0"
September 12° 25° -4.4° (1942) 40° (1899) 3.12" 0"
October 18° -13.9° (1925) 33.9° (2006) 2.77" 0"
November -1° -18.9° (1977) 27.2° (1950) 2.99" 2.1"
December -7° -31.1° (1924) 21.7° (1982) 2.4" 7.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 15° 27.2° 7° (1967) 38° (1913) 0.1" NA
Sep 2 15° 27.2° 7° (1946) 38° (1913) 0.1" NA
Sep 3 14.4° 26.7° 6° (1974) 37° (1913) 0.1" NA
Sep 4 14.4° 26.7° 4° (1974) 36° (1925) 0.1" NA
Sep 5 14.4° 26.7° 7° (1974) 40° (1899) 0.1" NA
Sep 6 13.9° 26.7° 5° (1988) 38° (1899) 0.1" NA
Sep 7 13.9° 26.1° 6° (1956) 38° (1939) 0.11" NA
Sep 8 13.9° 26.1° 4° (1986) 38° (1922) 0.11" NA
Sep 9 13.3° 26.1° 5° (1883) 38° (1933) 0.11" NA
Sep 10 13.3° 26.1° 5° (1910) 36° (1897) 0.11" NA
Sep 11 13.3° 25.6° 2° (1917) 37° (1933) 0.11" NA
Sep 12 12.8° 25.6° 5° (1917) 36° (1939) 0.11" NA
Sep 13 12.8° 25.6° 3° (1902) 37° (1939) 0.11" NA
Sep 14 12.8° 25° 3° (1923) 39° (1939) 0.11" NA
Sep 15 12.2° 25° 3° (1916) 38° (1939) 0.11" NA
Sep 16 12.2° 25° 2° (1916) 34° (1939) 0.11" NA
Sep 17 12.2° 24.4° 2° (1937) 35° (1927) 0.11" NA
Sep 18 11.7° 24.4° 1° (1916) 35° (1895) 0.11" NA
Sep 19 11.7° 24.4° 2° (1991) 35° (1948) 0.1" NA
Sep 20 11.1° 23.9° 0° (1991) 34° (1940) 0.1" NA
Sep 21 11.1° 23.9° 2° (1995) 34° (1940) 0.1" NA
Sep 22 11.1° 23.9° 1° (1995) 34° (1930) 0.1" NA
Sep 23 10.6° 23.3° -2° (1995) 33° (1937) 0.1" NA
Sep 24 10.6° 23.3° 1° (1989) 33° (2007) 0.1" NA
Sep 25 10.6° 23.3° 0° (1942) 33° (1891) 0.1" NA
Sep 26 10° 22.8° -2° (1928) 34° (1897) 0.1" NA
Sep 27 10° 22.8° -1° (1942) 32° (1891) 0.1" NA
Sep 28 9.4° 22.8° -4° (1942) 33° (1939) 0.1" NA
Sep 29 9.4° 22.2° 0° (1949) 37° (1953) 0.1" NA
Sep 30 9.4° 22.2° -3° (1899) 33° (1933) 0.1" NA
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