Illinois Temperature Records
All-time high and low temperatures recorded in Illinois, with monthly records dating back to 1970.
Key Facts
- Record High: The hottest temperature ever recorded in Illinois is 117°F, set on July 14, 1954.
- Record Low: The coldest temperature ever recorded in Illinois is -38°F, set on January 31, 2019.
- Data Coverage: Based on 57 years of data from 2,234 NOAA weather stations.
Related Analysis
All-Time Record High
117°F
July 14, 1954
Official NOAA Record
All-Time Record Low
-38°F
January 31, 2019
Official NOAA Record
Monthly Temperature Records
| Month | Record High | Record Low |
|---|---|---|
| January | 79°F(1996) | -38°F(2019) |
| February | 86°F(2024) | -36°F(2019) |
| March | 90°F(1988) | -20°F(2015) |
| April | 100°F(1987) | -2°F(1982) |
| May | 104°F(1987) | 15°F(1989) |
| June | 109°F(2012) | 29°F(1972) |
| July | 109°F(1987) | 38°F(1988) |
| August | 110°F(2002) | 32°F(1986) |
| September | 112°F(1990) | 19°F(1995) |
| October | 97°F(2006) | 5°F(1988) |
| November | 89°F(1987) | -16°F(2023) |
| December | 79°F(1970) | -29°F(2000) |
Snow Records
Find the snowiest days on record for any Illinois city
City Records in Illinois
More State Records
Temperature Analysis
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Look Up Weather for Any Date
Check the weather on birthdays, anniversaries, or any date since 1970
Explore Illinois Weather History