Charleston Weather Records

Charleston, Illinois weather averages and records from 1896–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Charleston, Illinois was 110 °F which occurred on July 15, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Charleston, Illinois was -27 °F which occurred on January 19, 1994.
Lowest Temperatures: All-Time By Year
Charleston Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 37.1 21.1 71 -27 2.9 9.1
February 42.0 24.4 77 -23 2.4 4.4
March 53.7 33.7 89 -14 3.0 1.8
April 66.7 44.2 92 14 5.0 0.2
May 76.0 54.4 101 26 4.5 0.0
June 84.4 63.0 108 35 4.6 0.0
July 86.9 66.3 110 45 4.3 0.0
August 85.9 64.4 107 39 2.8 0.0
September 80.1 56.5 104 25 3.2 0.0
October 67.6 45.5 94 11 3.8 0.0
November 53.8 35.3 84 -2 4.0 0.7
December 41.5 25.9 73 -20 2.8 4.3
Entire year 64.8 44.8 110 -27 43.7 20.1
More Charleston Weather Records
1896–2024
Highest daily low 83 °F August 19, 1972
Lowest daily high -8 °F January 20, 1985
Greatest daily range
(Difference of high and low)
58 °F November 12, 1911
Greatest difference in daily high
over two conscutive days
44 °F Jan 18–19, 1996
Most daily precipitation 6.5 inches June 28, 1957
Most monthly precipitation 14.1 inches September 1926
Most yearly precipitation 59.7 inches 2020
Most yearly days with precipitation 137 1898
Earliest snow in season October 20 1916
Latest snow in season April 23 1910
Most daily snow 12.0 inches January 30, 1982
Most monthly snow 32.1 inches January 1996
Most yearly snow 41.9 inches 1977
Most snow in a winter 45.1 inches 1995–1996
Greatest snow accumulation 24.0 inches January 7, 1996
Earliest freeze September 16 1916
Earliest day ≥ 80 °F March 7 2000
Earliest day ≥ 90 °F April 11 1930
Earliest day ≥ 100 °F May 31 1934
Latest freeze May 26 1925
Latest day ≥ 80 °F November 19 1930
Latest day ≥ 90 °F October 15 1897
Latest day ≥ 100 °F September 11 1933
Most days in a year < 0 °F 19 1963
Most days in a year < 32 °F 125 1976
Most days in a year ≥ 80 °F 143 2007
Most days in a year ≥ 90 °F 80 1936
Most days in a year ≥ 100 °F 26 1936
Most days in a year ≥ 110 °F 2 1936
Charleston Weather Streaks
Most consecutive days...
With precipitation 14 days Jun 30 – Jul 13, 1905
Without precipitation 47 days Dec 3, 1955 – Jan 18, 1956
With snow 5 days Jan 6–10, 1943
High temperature at or
below freezing
25 days Jan 28 – Feb 21, 1902
High temperature ≥ 80 °F 85 days May 27 – Aug 19, 1934
High temperature ≥ 90 °F 34 days Jun 25 – Jul 28, 1936
High temperature ≥ 100 °F 13 days Jul 5–17, 1936
Plant Hardiness Zone
6A
Charleston is in plant hardiness zone 6A
based on average yearly minimum temperature from 1991–2020
Charleston Weather by Year
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Weather Station Details
Years Station Coordinates
1896–2024 Charleston location