NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
December 1984 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 1984 1-Month | 35.8°F (2.1°C) | 29.4°F (-1.4°C) | 6.4°F | 117th Coolest | Coolest since: | 1983 |
| 14th Warmest | Warmest since: | 2015 | ||||
| Nov– 2-Month | 38.4°F (3.6°C) | 35.1°F (1.7°C) | 3.3°F | 104th Coolest | Coolest since: | 1950 |
| 27th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 44.9°F (7.2°C) | 41.6°F (5.3°C) | 3.3°F | 114th Coolest | Coolest since: | 1976 |
| 17th Warmest | Warmest since: | 1931 | ||||
| Ties: 1918, 1956 | ||||||
| Sep– 4-Month | 49.7°F (9.8°C) | 47.8°F (8.8°C) | 1.9°F | 105th Coolest | Coolest since: | 1976 |
| 26th Warmest | Warmest since: | 1931 | ||||
| Aug– 5-Month | 54.7°F (12.6°C) | 52.9°F (11.6°C) | 1.8°F | 109th Coolest | Coolest since: | 1976 |
| 22nd Warmest | Warmest since: | 1931 | ||||
| Ties: 1922 | ||||||
| Jul– 6-Month | 57.8°F (14.3°C) | 56.7°F (13.7°C) | 1.1°F | 96th Coolest | Coolest since: | 1976 |
| 35th Warmest | Warmest since: | 1931 | ||||
| Jun– 7-Month | 60.2°F (15.7°C) | 58.8°F (14.9°C) | 1.4°F | 104th Coolest | Coolest since: | 1917 |
| 27th Warmest | Warmest since: | 1931 | ||||
| May– 8-Month | 60.1°F (15.6°C) | 59.2°F (15.1°C) | 0.9°F | 89th Coolest | Coolest since: | 1917 |
| 42nd Warmest | Warmest since: | 1931 | ||||
| Apr– 9-Month | 59.0°F (15.0°C) | 58.3°F (14.6°C) | 0.7°F | 78th Coolest | Coolest since: | 1917 |
| 53rd Warmest | Warmest since: | 1931 | ||||
| Mar– 10-Month | 56.4°F (13.6°C) | 56.5°F (13.6°C) | -0.1°F | 53rd Coolest | Coolest since: | 1917 |
| 78th Warmest | Warmest since: | 2012 | ||||
| Feb– 11-Month | 54.5°F (12.5°C) | 54.0°F (12.2°C) | 0.5°F | 79th Coolest | Coolest since: | 1917 |
| 52nd Warmest | Warmest since: | 2024 | ||||
| Jan– 12-Month | 51.8°F (11.0°C) | 51.6°F (10.9°C) | 0.2°F | 67th Coolest | Coolest since: | 1917 |
| 64th Warmest | Warmest since: | 2012 | ||||
| Ties: 1925, 1957, 1981 | ||||||
| Jul 1983– 18-Month | 53.5°F (11.9°C) | 53.3°F (11.8°C) | 0.2°F | 67th Coolest | Coolest since: | 1904 |
| 63rd Warmest | Warmest since: | 2012 | ||||
| Jan 1983– 24-Month | 51.9°F (11.1°C) | 51.6°F (10.9°C) | 0.3°F | 77th Coolest | Coolest since: | 1904, 1979 |
| 53rd Warmest | Warmest since: | 2024 | ||||
| Ties: 1940 | ||||||
| Jan 1982– 36-Month | 51.5°F (10.8°C) | 51.6°F (10.9°C) | -0.1°F | 55th Coolest | Coolest since: | 1905 |
| 74th Warmest | Warmest since: | 2024 | ||||
| Jan 1981– 48-Month | 51.6°F (10.9°C) | 51.6°F (10.9°C) | 0.0°F | 55th Coolest | Coolest since: | 1905 |
| 73rd Warmest | Warmest since: | 2024 | ||||
| Jan 1980– 60-Month | 51.5°F (10.8°C) | 51.6°F (10.9°C) | -0.1°F | 50th Coolest | Coolest since: | 1905 |
| 77th Warmest | Warmest since: | 2024 | ||||
| Ties: 1914, 1915, 1921, 1976 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on April 2, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings
