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
Jun 1 12.8° 26.7° 4° (1966) 40° (1934) 0.16" NA
Jun 2 12.8° 26.7° 5° (1993) 37° (1934) 0.16" NA
Jun 3 12.8° 26.7° 6° (1910) 38° (1934) 0.15" NA
Jun 4 12.8° 27.2° 4° (1929) 35° (1911) 0.15" NA
Jun 5 13.3° 27.2° 2° (1993) 36° (1933) 0.15" NA
Jun 6 13.3° 27.2° 6° (2000) 37° (1934) 0.15" NA
Jun 7 13.3° 27.2° 4° (1944) 36° (1933) 0.15" NA
Jun 8 13.9° 27.8° 3° (1930) 36° (1934) 0.15" NA
Jun 9 13.9° 27.8° 4° (1913) 37° (1911) 0.15" NA
Jun 10 13.9° 27.8° 6° (1913) 37° (1911) 0.15" NA
Jun 11 14.4° 27.8° 5° (1972) 37° (1914) 0.15" NA
Jun 12 14.4° 28.3° 5° (1903) 35° (1902) 0.15" NA
Jun 13 14.4° 28.3° 7° (1903) 37° (1954) 0.15" NA
Jun 14 14.4° 28.3° 7° (1955) 37° (1954) 0.15" NA
Jun 15 15° 28.3° 7° (1917) 37° (1987) 0.14" NA
Jun 16 15° 28.9° 3° (1917) 37° (1987) 0.14" NA
Jun 17 15° 28.9° 7° (2005) 38° (1913) 0.14" NA
Jun 18 15° 28.9° 7° (1999) 38° (1913) 0.14" NA
Jun 19 15.6° 28.9° 7° (1999) 39° (1936) 0.14" NA
Jun 20 15.6° 28.9° 6° (1980) 38° (1953) 0.14" NA
Jun 21 15.6° 29.4° 4° (1992) 37° (1901) 0.14" NA
Jun 22 15.6° 29.4° 3° (1992) 38° (1944) 0.14" NA
Jun 23 15.6° 29.4° 7° (1972) 38° (1923) 0.14" NA
Jun 24 16.1° 29.4° 6° (1972) 37° (1922) 0.14" NA
Jun 25 16.1° 29.4° 9° (1972) 39° (1954) 0.14" NA
Jun 26 16.1° 30° 7° (2004) 40° (1954) 0.14" NA
Jun 27 16.1° 30° 8° (1905) 39° (1931) 0.14" NA
Jun 28 16.1° 30° 8° (1992) 40° (1934) 0.14" NA
Jun 29 16.1° 30° 7° (1923) 39° (1936) 0.14" NA
Jun 30 16.7° 30° 8° (1923) 42° (1931) 0.14" NA
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