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
May 1 7.8° 20° -2° (1907) 32° (1901) 0.13" NA
May 2 7.8° 20° -1° (1911) 33° (1901) 0.13" NA
May 3 7.8° 20.6° -2° (2005) 33° (1895) 0.13" NA
May 4 8.3° 20.6° -1° (2005) 32° (1959) 0.13" NA
May 5 8.3° 20.6° 0° (1944) 33° (1952) 0.13" NA
May 6 8.3° 21.1° -1° (1944) 33° (1896) 0.13" NA
May 7 8.9° 21.1° -2° (1906) 33° (1896) 0.13" NA
May 8 8.9° 21.1° 0° (1923) 34° (1896) 0.13" NA
May 9 8.9° 21.7° -1° (1966) 34° (1895) 0.13" NA
May 10 9.4° 21.7° -4° (1966) 34° (1896) 0.14" NA
May 11 9.4° 21.7° 0° (1907) 32° (1896) 0.14" NA
May 12 9.4° 22.2° 0° (1960) 33° (1956) 0.14" NA
May 13 10° 22.2° -1° (1971) 32° (1915) 0.14" NA
May 14 10° 22.2° 1° (1920) 34° (1887) 0.14" NA
May 15 10° 22.8° 2° (1920) 34° (1894) 0.14" NA
May 16 10.6° 22.8° 1° (1997) 34° (1894) 0.14" NA
May 17 10.6° 22.8° 1° (1973) 33° (1894) 0.14" NA
May 18 10.6° 23.3° 1° (2002) 34° (1902) 0.14" NA
May 19 11.1° 23.3° 2° (1929) 33° (1975) 0.14" NA
May 20 11.1° 23.3° 2° (1954) 33° (1987) 0.14" NA
May 21 11.7° 23.9° 1° (2002) 34° (1934) 0.14" NA
May 22 11.7° 23.9° 2° (1963) 34° (1925) 0.14" NA
May 23 11.7° 23.9° 2° (1963) 33° (1975) 0.14" NA
May 24 12.2° 24.4° 1° (1925) 34° (1939) 0.13" NA
May 25 12.2° 24.4° -1° (1925) 34° (1911) 0.13" NA
May 26 12.2° 24.4° 1° (1979) 35° (1911) 0.13" NA
May 27 12.8° 25° 2° (1992) 34° (1911) 0.13" NA
May 28 12.8° 25° 2° (1907) 34° (2006) 0.13" NA
May 29 12.8° 25° 1° (1965) 37° (1934) 0.13" NA
May 30 13.3° 25.6° 3° (1930) 37° (1934) 0.13" NA
May 31 13.3° 25.6° 2° (1897) 40° (1934) 0.13" NA
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