NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
December 1920 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 1920 1-Month | 31.4°F (-0.3°C) | 29.4°F (-1.4°C) | 2.0°F | 76th Coolest | Coolest since: | 1983 |
| 55th Warmest | Warmest since: | 2015 | ||||
| Nov– 2-Month | 35.0°F (1.7°C) | 35.1°F (1.7°C) | -0.1°F | 52nd Coolest | Coolest since: | 1950 |
| 79th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 43.0°F (6.1°C) | 41.6°F (5.3°C) | 1.4°F | 88th Coolest | Coolest since: | 1976 |
| 43rd Warmest | Warmest since: | 1931 | ||||
| Sep– 4-Month | 49.4°F (9.7°C) | 47.8°F (8.8°C) | 1.6°F | 99th Coolest | Coolest since: | 1976 |
| 32nd Warmest | Warmest since: | 1931 | ||||
| Aug– 5-Month | 53.8°F (12.1°C) | 52.9°F (11.6°C) | 0.9°F | 86th Coolest | Coolest since: | 1976 |
| 45th Warmest | Warmest since: | 1931 | ||||
| Jul– 6-Month | 57.1°F (13.9°C) | 56.7°F (13.7°C) | 0.4°F | 67th Coolest | Coolest since: | 1976 |
| 64th Warmest | Warmest since: | 1931 | ||||
| Jun– 7-Month | 59.2°F (15.1°C) | 58.8°F (14.9°C) | 0.4°F | 71st Coolest | Coolest since: | 1917 |
| 60th Warmest | Warmest since: | 1931 | ||||
| May– 8-Month | 59.3°F (15.2°C) | 59.2°F (15.1°C) | 0.1°F | 56th Coolest | Coolest since: | 1917 |
| 75th Warmest | Warmest since: | 1931 | ||||
| Apr– 9-Month | 57.8°F (14.3°C) | 58.3°F (14.6°C) | -0.5°F | 37th Coolest | Coolest since: | 1917 |
| 94th Warmest | Warmest since: | 1931 | ||||
| Mar– 10-Month | 56.1°F (13.4°C) | 56.5°F (13.6°C) | -0.4°F | 40th Coolest | Coolest since: | 1917 |
| 91st Warmest | Warmest since: | 2012 | ||||
| Feb– 11-Month | 53.6°F (12.0°C) | 54.0°F (12.2°C) | -0.4°F | 43rd Coolest | Coolest since: | 1917 |
| 88th Warmest | Warmest since: | 2024 | ||||
| Jan– 12-Month | 50.8°F (10.4°C) | 51.6°F (10.9°C) | -0.8°F | 32nd Coolest | Coolest since: | 1917 |
| 99th Warmest | Warmest since: | 2012 | ||||
| Ties: 1899, 1901, 1910 | ||||||
| Jul 1919– 18-Month | 52.6°F (11.4°C) | 53.3°F (11.8°C) | -0.7°F | 30th Coolest | Coolest since: | 1904 |
| 100th Warmest | Warmest since: | 2012 | ||||
| Jan 1919– 24-Month | 51.5°F (10.8°C) | 51.6°F (10.9°C) | -0.1°F | 58th Coolest | Coolest since: | 1904, 1979 |
| 72nd Warmest | Warmest since: | 2024 | ||||
| Jan 1918– 36-Month | 51.4°F (10.8°C) | 51.6°F (10.9°C) | -0.2°F | 48th Coolest | Coolest since: | 1905 |
| 81st Warmest | Warmest since: | 2024 | ||||
| Jan 1917– 48-Month | 50.6°F (10.3°C) | 51.6°F (10.9°C) | -1.0°F | 9th Coolest | Coolest since: | 1905 |
| 119th Warmest | Warmest since: | 2024 | ||||
| Ties: 1917 | ||||||
| Jan 1916– 60-Month | 50.7°F (10.4°C) | 51.6°F (10.9°C) | -0.9°F | 8th Coolest | Coolest since: | 1905 |
| 119th Warmest | Warmest since: | 2024 | ||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on March 25, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings
