NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
February 2021 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| February 2021 1-Month | 20.8°F (-6.2°C) | 29.2°F (-1.6°C) | -8.4°F | 11th Coolest | Coolest since: | 1978 |
| 121st Warmest | Warmest since: | 2017 | ||||
| Jan– 2-Month | 25.2°F (-3.8°C) | 27.3°F (-2.6°C) | -2.1°F | 37th Coolest | Coolest since: | 1979 |
| 95th Warmest | Warmest since: | 2017 | ||||
| Dec 2020– 3-Month | 27.8°F (-2.3°C) | 28.0°F (-2.2°C) | -0.2°F | 51st Coolest | Coolest since: | 1978 |
| 80th Warmest | Warmest since: | 1932 | ||||
| Ties: 1943 | ||||||
| Nov 2020– 4-Month | 32.6°F (0.3°C) | 31.2°F (-0.4°C) | 1.4°F | 90th Coolest | Coolest since: | 1977 |
| 41st Warmest | Warmest since: | 1932 | ||||
| Ties: 1928, 1989 | ||||||
| Oct 2020– 5-Month | 36.5°F (2.5°C) | 35.9°F (2.2°C) | 0.6°F | 76th Coolest | Coolest since: | 1977 |
| 55th Warmest | Warmest since: | 1932 | ||||
| Ties: 1922, 1934 | ||||||
| Sep 2020– 6-Month | 41.3°F (5.2°C) | 41.0°F (5.0°C) | 0.3°F | 71st Coolest | Coolest since: | 1977 |
| 60th Warmest | Warmest since: | 1932 | ||||
| Ties: 1981 | ||||||
| Aug 2020– 7-Month | 45.8°F (7.7°C) | 45.6°F (7.6°C) | 0.2°F | 61st Coolest | Coolest since: | 1977 |
| 70th Warmest | Warmest since: | 1932 | ||||
| Ties: 1915, 1956, 1984 | ||||||
| Jul 2020– 8-Month | 49.8°F (9.9°C) | 49.4°F (9.7°C) | 0.4°F | 72nd Coolest | Coolest since: | 1977 |
| 59th Warmest | Warmest since: | 1932 | ||||
| Ties: 1961, 1990, 2007, 2011 | ||||||
| Jun 2020– 9-Month | 52.4°F (11.3°C) | 51.8°F (11.0°C) | 0.6°F | 77th Coolest | Coolest since: | 1977 |
| 54th Warmest | Warmest since: | 1932 | ||||
| Ties: 1947 | ||||||
| May 2020– 10-Month | 53.2°F (11.8°C) | 52.8°F (11.6°C) | 0.4°F | 71st Coolest | Coolest since: | 1918 |
| 60th Warmest | Warmest since: | 1932 | ||||
| Ties: 1945, 1956, 2007 | ||||||
| Apr 2020– 11-Month | 52.9°F (11.6°C) | 52.7°F (11.5°C) | 0.2°F | 60th Coolest | Coolest since: | 1918 |
| 71st Warmest | Warmest since: | 1932 | ||||
| Ties: 1913, 1961, 2003 | ||||||
| Mar 2020– 12-Month | 52.2°F (11.2°C) | 51.6°F (10.9°C) | 0.6°F | 77th Coolest | Coolest since: | 1918 |
| 54th Warmest | Warmest since: | 2017 | ||||
| Ties: 1976, 2004 | ||||||
| Sep 2019– 18-Month | 49.3°F (9.6°C) | 48.1°F (8.9°C) | 1.2°F | 101st Coolest | Coolest since: | 1905 |
| 29th Warmest | Warmest since: | 2017 | ||||
| Mar 2019– 24-Month | 52.5°F (11.4°C) | 51.6°F (10.9°C) | 0.9°F | 93rd Coolest | Coolest since: | 1905 |
| 37th Warmest | Warmest since: | 2017 | ||||
| Ties: 1915, 1957 | ||||||
| Mar 2018– 36-Month | 52.5°F (11.4°C) | 51.6°F (10.9°C) | 0.9°F | 96th Coolest | Coolest since: | 1979 |
| 33rd Warmest | Warmest since: | 2013, 2018 | ||||
| Ties: 1922, 1990, 2003 | ||||||
| Mar 2017– 48-Month | 52.6°F (11.4°C) | 51.6°F (10.9°C) | 1.0°F | 101st Coolest | Coolest since: | 1905 |
| 27th Warmest | Warmest since: | 2025 | ||||
| Ties: 1922, 1923, 1924, 1940, 1942 | ||||||
| Mar 2016– 60-Month | 53.2°F (11.8°C) | 51.6°F (10.9°C) | 1.6°F | 121st Coolest | Coolest since: | 1905 |
| 6th Warmest | Warmest since: | 2025 | ||||
| Ties: 2008 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published March 2025, retrieved on March 20, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings
