Illinois Temperature Records
The coldest temperature ever recorded in Illinois is -38°F at Official NOAA Record (January 31, 2019); the hottest is 117°F (July 14, 1954). Below: every month's record high and low, 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 | 94°F(2026) | -20°F(2015) |
| April | 100°F(1987) | -2°F(2018) |
| May | 104°F(1987) | 15°F(1989) |
| June | 109°F(2012) | 29°F(1972) |
| July | 117°F(1954) | 38°F(1988) |
| August | 110°F(2002) | 32°F(2022) |
| September | 112°F(1990) | 19°F(1995) |
| October | 97°F(2006) | 5°F(1988) |
| November | 89°F(1987) | -16°F(2023) |
| December | 79°F(1982) | -29°F(2000) |
Snow Records
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City Records in Illinois
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Temperature Analysis
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