Jacksonville, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -8° -31.1° (1927) 23.9° (1950) 1.59" 4.5"
February -6° -33.3° (1934) 26.7° (1932) 1.76" 4.6"
March -2° 11° -25.6° (1948) 32.8° (1907) 2.72" 2.3"
April 18° -12.2° (1920) 34.4° (1930) 4.03" 0.3"
May 10° 24° -3.3° (1966) 39.4° (1934) 4.81" 0"
June 15° 28° 2.2° (1993) 41.7° (1931) 4.58" 0"
July 17° 30° 6.1° (1930) 45.6° (1954) 3.95" 0"
August 16° 30° 3.9° (1986) 44.4° (1934) 3.42" 0"
September 11° 26° -3.9° (1942) 39.4° (1913) 3.53" 0"
October 20° -12.8° (1925) 35° (1922) 3.01" 0"
November 12° -20.6° (1929) 28.9° (1937) 3.62" 0.5"
December -6° -31.1° (1944) 23.3° (1998) 2.5" 5.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 17° 30° 9° (1971) 37° (1935) 0.13" 0"
Aug 2 17° 30° 8° (1920) 39° (1934) 0.13" 0"
Aug 3 17° 30° 9° (1920) 41° (1930) 0.12" 0"
Aug 4 17° 30° 7° (1912) 42° (1918) 0.12" 0"
Aug 5 17° 30° 8° (1912) 41° (1918) 0.12" 0"
Aug 6 17° 30° 7° (2004) 41° (1934) 0.12" 0"
Aug 7 17° 30° 8° (1994) 41° (1934) 0.11" 0"
Aug 8 17° 30° 8° (2004) 44° (1934) 0.12" 0"
Aug 9 17° 30° 8° (1964) 44° (1934) 0.12" 0"
Aug 10 17° 30° 9° (1917) 39° (1934) 0.11" 0"
Aug 11 17° 30° 8° (1930) 39° (1926) 0.12" 0"
Aug 12 16° 30° 8° (1967) 40° (1918) 0.1" 0"
Aug 13 16° 30° 7° (1964) 41° (1936) 0.11" 0"
Aug 14 16° 30° 7° (1924) 40° (1936) 0.11" 0"
Aug 15 16° 30° 6° (2004) 39° (1936) 0.11" 0"
Aug 16 16° 30° 6° (2004) 40° (1936) 0.11" 0"
Aug 17 16° 30° 8° (1992) 38° (1922) 0.11" 0"
Aug 18 16° 30° 8° (1992) 42° (1936) 0.11" 0"
Aug 19 16° 30° 9° (1943) 39° (1936) 0.11" 0"
Aug 20 16° 30° 8° (1950) 40° (1936) 0.11" 0"
Aug 21 16° 29° 4° (1950) 41° (1936) 0.1" 0"
Aug 22 16° 29° 8° (1992) 41° (1936) 0.11" 0"
Aug 23 16° 29° 8° (1923) 40° (1936) 0.09" 0"
Aug 24 16° 29° 6° (1942) 41° (1936) 0.1" 0"
Aug 25 15° 29° 7° (1958) 39° (1936) 0.1" 0"
Aug 26 15° 29° 6° (1910) 40° (1936) 0.1" 0"
Aug 27 15° 29° 6° (1910) 37° (1936) 0.1" 0"
Aug 28 15° 29° 5° (1986) 37° (1913) 0.11" 0"
Aug 29 15° 29° 4° (1986) 37.2° (2007) 0.1" 0"
Aug 30 15° 29° 4° (1986) 38° (1947) 0.1" 0"
Aug 31 15° 29° 4° (1915) 37° (1913) 0.11" 0"
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