NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
January 1900 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| January 1900 1-Month | 30.0°F (-1.1°C) | 25.3°F (-3.7°C) | 4.7°F | 105th Coolest | Coolest since: | 1977 |
| 27th Warmest | Warmest to Date | 2006 | ||||
| Dec 1899– 2-Month | 28.7°F (-1.8°C) | 27.5°F (-2.5°C) | 1.2°F | 70th Coolest | Coolest since: | 1918 |
| 61st Warmest | Warmest since: | 1932 | ||||
| Ties: 1897 | ||||||
| Nov 1899– 3-Month | 34.1°F (1.2°C) | 31.9°F (-0.1°C) | 2.2°F | 95th Coolest | Coolest since: | 1977 |
| 36th Warmest | Warmest to Date | 1932 | ||||
| Oct 1899– 4-Month | 40.1°F (4.5°C) | 37.6°F (3.1°C) | 2.5°F | 104th Coolest | Coolest since: | 1977 |
| 27th Warmest | Warmest to Date | 1932 | ||||
| Sep 1899– 5-Month | 45.0°F (7.2°C) | 43.3°F (6.3°C) | 1.7°F | 98th Coolest | Coolest since: | 1977 |
| 33rd Warmest | Warmest since: | 1932 | ||||
| Aug 1899– 6-Month | 50.1°F (10.1°C) | 48.4°F (9.1°C) | 1.7°F | 105th Coolest | Coolest since: | 1977 |
| 26th Warmest | Warmest to Date | 1932 | ||||
| Jul 1899– 7-Month | 53.6°F (12.0°C) | 52.2°F (11.2°C) | 1.4°F | 98th Coolest | Coolest since: | 1977 |
| 33rd Warmest | Warmest to Date | 1932 | ||||
| Jun 1899– 8-Month | 56.0°F (13.3°C) | 54.6°F (12.6°C) | 1.4°F | 98th Coolest | Coolest since: | 1918, 1977 |
| 33rd Warmest | Warmest to Date | 1932 | ||||
| May 1899– 9-Month | 56.8°F (13.8°C) | 55.5°F (13.1°C) | 1.3°F | 99th Coolest | Coolest since: | 1918 |
| 32nd Warmest | Warmest to Date | 1932 | ||||
| Apr 1899– 10-Month | 56.4°F (13.6°C) | 55.1°F (12.8°C) | 1.3°F | 97th Coolest | Coolest since: | 1918 |
| 34th Warmest | Warmest to Date | 1932 | ||||
| Mar 1899– 11-Month | 54.2°F (12.3°C) | 53.7°F (12.1°C) | 0.5°F | 79th Coolest | Coolest since: | 1918 |
| 52nd Warmest | Warmest to Date | 2013 | ||||
| Feb 1899– 12-Month | 51.2°F (10.7°C) | 51.6°F (10.9°C) | -0.4°F | 42nd Coolest | Coolest since: | 1918 |
| 89th Warmest | Warmest since: | 2013 | ||||
| Aug 1898– 18-Month | 49.7°F (9.8°C) | 50.5°F (10.3°C) | -0.8°F | 26th Coolest | Coolest to Date | 1905, 1918 |
| 104th Warmest | Warmest since: | 2017 | ||||
| Feb 1898– 24-Month | 51.1°F (10.6°C) | 51.6°F (10.9°C) | -0.5°F | 30th Coolest | Coolest to Date | 1918 |
| 100th Warmest | Warmest since: | 2013 | ||||
| Feb 1897– 36-Month | 51.4°F (10.8°C) | 51.6°F (10.9°C) | -0.2°F | 43rd Coolest | Coolest since: | 1905 |
| 86th Warmest | Warmest since: | 2013 | ||||
| Feb 1896– 48-Month | 51.5°F (10.8°C) | 51.6°F (10.9°C) | -0.1°F | 49th Coolest | Coolest since: | 1905 |
| 79th Warmest | Warmest to Date | 2025 | ||||
| Feb 1895– 60-Month | 51.3°F (10.7°C) | 51.6°F (10.9°C) | -0.3°F | 39th Coolest | Coolest to Date | 1906 |
| 88th Warmest | Warmest to Date | 2025 | ||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on March 28, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings
