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.
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
Look Up Weather for Any Date
Check the weather on birthdays, anniversaries, or any date since 1970
Explore Illinois Weather History