Jacksonville, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -9° -31.1° (1927) 23.9° (1950) 1.35" 6.6"
February -7° -33.3° (1934) 26.7° (1932) 1.69" 6.5"
March -2° 11° -25.6° (1948) 32.8° (1907) 3.18" 2.3"
April 18° -12.2° (1920) 34.4° (1930) 3.77" 0.4"
May 23° -3.3° (1966) 39.4° (1934) 4.86" 0"
June 15° 28° 2.2° (1993) 41.7° (1931) 4.36" 0"
July 17° 31° 6.1° (1930) 45.6° (1954) 3.85" 0"
August 16° 29° 3.9° (1986) 44.4° (1934) 3.35" 0"
September 11° 26° -3.9° (1942) 39.4° (1913) 3.46" 0"
October 20° -12.8° (1925) 35° (1922) 2.61" 0"
November -1° 11° -20.6° (1929) 28.9° (1937) 3.45" 1.2"
December -7° -31.1° (1944) 23.3° (1998) 2.54" 5.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Aug 1 16.7° 30.6° 9° (1971) 37° (1935) 0.11" NA
Aug 2 16.7° 30.6° 8° (1920) 39° (1934) 0.11" NA
Aug 3 16.7° 30.6° 9° (1920) 41° (1930) 0.11" NA
Aug 4 16.7° 30° 7° (1912) 42° (1918) 0.11" NA
Aug 5 16.7° 30° 8° (1912) 41° (1918) 0.11" NA
Aug 6 16.7° 30° 7° (2004) 41° (1934) 0.11" NA
Aug 7 16.7° 30° 8° (1994) 41° (1934) 0.11" NA
Aug 8 16.7° 30° 8° (2004) 44° (1934) 0.11" NA
Aug 9 16.7° 30° 8° (1964) 44° (1934) 0.11" NA
Aug 10 16.1° 30° 9° (1917) 39° (1934) 0.11" NA
Aug 11 16.1° 30° 8° (1930) 39° (1926) 0.11" NA
Aug 12 16.1° 30° 8° (1967) 40° (1918) 0.1" NA
Aug 13 16.1° 29.4° 7° (1964) 41° (1936) 0.1" NA
Aug 14 16.1° 29.4° 7° (1924) 40° (1936) 0.1" NA
Aug 15 16.1° 29.4° 6° (2004) 39° (1936) 0.1" NA
Aug 16 15.6° 29.4° 6° (2004) 40° (1936) 0.1" NA
Aug 17 15.6° 29.4° 8° (1992) 38° (1922) 0.1" NA
Aug 18 15.6° 29.4° 8° (1992) 42° (1936) 0.11" NA
Aug 19 15.6° 29.4° 9° (1943) 39° (1936) 0.11" NA
Aug 20 15.6° 29.4° 8° (1950) 40° (1936) 0.11" NA
Aug 21 15° 28.9° 4° (1950) 41° (1936) 0.11" NA
Aug 22 15° 28.9° 8° (1992) 41° (1936) 0.11" NA
Aug 23 15° 28.9° 8° (1923) 40° (1936) 0.11" NA
Aug 24 15° 28.9° 6° (1942) 41° (1936) 0.11" NA
Aug 25 14.4° 28.9° 7° (1958) 39° (1936) 0.11" NA
Aug 26 14.4° 28.9° 6° (1910) 40° (1936) 0.11" NA
Aug 27 14.4° 28.9° 6° (1910) 37° (1936) 0.11" NA
Aug 28 14.4° 28.3° 5° (1986) 37° (1913) 0.11" NA
Aug 29 13.9° 28.3° 4° (1986) 37.2° (2007) 0.11" NA
Aug 30 13.9° 28.3° 4° (1986) 38° (1947) 0.11" NA
Aug 31 13.9° 28.3° 4° (1915) 37° (1913) 0.11" NA
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