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
Feb 1 -8.9° 2.2° -25° (1996) 22° (1989) 0.04" NA
Feb 2 -8.9° 2.2° -27° (1951) 17° (1911) 0.04" NA
Feb 3 -8.9° 2.8° -29° (1996) 19° (1931) 0.05" NA
Feb 4 -8.3° 2.8° -29° (1996) 20° (1992) 0.05" NA
Feb 5 -8.3° 2.8° -27° (1996) 21° (1938) 0.05" NA
Feb 6 -8.3° 2.8° -25° (1979) 18° (1904) 0.05" NA
Feb 7 -8.3° 3.3° -26° (1905) 18° (1925) 0.05" NA
Feb 8 -8.3° 3.3° -25° (1933) 18° (1925) 0.05" NA
Feb 9 -7.8° 3.3° -26° (1933) 21° (1943) 0.05" NA
Feb 10 -7.8° 3.9° -26° (1979) 27° (1932) 0.05" NA
Feb 11 -7.8° 3.9° -26° (1982) 22° (1932) 0.05" NA
Feb 12 -7.8° 3.9° -25° (1944) 24° (1938) 0.06" NA
Feb 13 -7.2° 4.4° -33° (1905) 22° (1938) 0.06" NA
Feb 14 -7.2° 4.4° -26° (1905) 23° (1954) 0.06" NA
Feb 15 -7.2° 4.4° -28° (1905) 22° (1954) 0.06" NA
Feb 16 -7.2° -22° (1943) 21° (1911) 0.06" NA
Feb 17 -6.7° -28° (1903) 19° (1911) 0.06" NA
Feb 18 -6.7° -24° (1910) 18° (1913) 0.06" NA
Feb 19 -6.7° 5.6° -24° (1903) 22° (1930) 0.07" NA
Feb 20 -6.1° 5.6° -22° (1978) 22° (1930) 0.07" NA
Feb 21 -6.1° 5.6° -20° (1963) 23° (1930) 0.07" NA
Feb 22 -6.1° 6.1° -20° (1963) 23° (1922) 0.07" NA
Feb 23 -5.6° 6.1° -19° (1910) 22° (2000) 0.07" NA
Feb 24 -5.6° 6.7° -21° (1989) 27° (1930) 0.07" NA
Feb 25 -5.6° 6.7° -21° (1914) 23° (1930) 0.08" NA
Feb 26 -5.6° 6.7° -27° (1963) 23° (2000) 0.08" NA
Feb 27 -5° 7.2° -33° (1934) 23° (1996) 0.08" NA
Feb 28 -5° 7.2° -17° (1962) 23° (1976) 0.08" NA
Feb 29 -5° 7.2° -16° (1960) 21° (1972) 0.08" NA
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