Jacksonville Weather Records

Jacksonville, Illinois weather averages and records from 1895–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Jacksonville, Illinois was 114 °F which occurred on July 14, 1954.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Jacksonville, Illinois was -28 °F which occurred on February 27, 1934.
Lowest Temperatures: All-Time By Year
Jacksonville Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 36.0 17.7 75 -24 1.9 6.8
February 41.1 21.0 81 -28 1.7 4.1
March 52.4 29.7 91 -14 2.8 1.9
April 64.9 39.9 94 10 4.3 0.3
May 74.8 51.3 103 26 4.8 0.0
June 83.3 60.4 107 36 4.9 0.0
July 86.5 63.6 114 43 4.0 0.0
August 85.2 61.3 112 39 3.4 0.0
September 80.0 53.3 106 23 3.5 0.0
October 67.8 41.9 98 9 3.0 0.0
November 53.0 31.7 84 -5 3.0 0.9
December 41.2 23.0 74 -21 1.9 4.3
Entire year 64.0 41.3 114 -28 39.0 18.4
More Jacksonville Weather Records
1895–2024
Highest daily low 81 °F June 28, 1952
Lowest daily high -9 °F December 25, 1983
Greatest daily range
(Difference of high and low)
62 °F January 19, 1996
Greatest difference in daily high
over two conscutive days
47 °F Jan 19–20, 1996
Most daily precipitation 5.0 inches September 23, 1993
Most monthly precipitation 16.0 inches September 1993
Most yearly precipitation 60.0 inches 1973
Most yearly days with precipitation 145 2021
Earliest snow in season October 20 1916
Latest snow in season April 24 1910
Most daily snow 12.0 inches February 2, 2011
Most monthly snow 26.0 inches March 1960
Most yearly snow 48.6 inches 1977
Most snow in a winter 53.0 inches 1977–1978
Greatest snow accumulation 18.0 inches March 9, 1978
Earliest freeze September 20 1896
Earliest day ≥ 90 °F March 21 1907
Earliest day ≥ 100 °F May 31 1934
Latest freeze May 25 1934
Latest day ≥ 90 °F October 30 1950
Latest day ≥ 100 °F September 29 1953
Most days in a year < 0 °F 25 1977
Most days in a year < 32 °F 146 2018
Most days in a year ≥ 80 °F 153 1956
Most days in a year ≥ 90 °F 82 1936
Most days in a year ≥ 100 °F 36 1936
Most days in a year ≥ 110 °F 5 1934
Jacksonville Weather Streaks
Most consecutive days...
With precipitation 12 days Jun 11–22, 2011
Without precipitation 36 days Aug 24 – Sep 28, 1939
With snow 5 days Jan 17–21, 1922
High temperature at or
below freezing
27 days Dec 29, 1976 – Jan 24, 1977
High temperature ≥ 80 °F 94 days Jun 10 – Sep 11, 1901
High temperature ≥ 90 °F 29 days Jul 10 – Aug 7, 1916
High temperature ≥ 100 °F 14 days Jul 4–17, 1936
Plant Hardiness Zone
6A
Jacksonville is in plant hardiness zone 6A
based on average yearly minimum temperature from 1991–2020
Jacksonville Weather by Year
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Weather Station Details
Years Station Coordinates
1895–2024 Jacksonville 2E location