NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
February 2020 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| February 2020 1-Month | 31.9°F (-0.1°C) | 29.2°F (-1.6°C) | 2.7°F | 93rd Coolest | Coolest since: | 1978 |
| 39th Warmest | Warmest since: | 2017 | ||||
| Ties: 1928 | ||||||
| Jan– 2-Month | 31.9°F (-0.1°C) | 27.3°F (-2.6°C) | 4.6°F | 113th Coolest | Coolest since: | 1979 |
| 19th Warmest | Warmest since: | 2017 | ||||
| Dec 2019– 3-Month | 33.1°F (0.6°C) | 28°F (-2.2°C) | 5.1°F | 120th Coolest | Coolest since: | 1978 |
| 11th Warmest | Warmest since: | 1932 | ||||
| Nov 2019– 4-Month | 33.9°F (1.1°C) | 31.2°F (-0.4°C) | 2.7°F | 107th Coolest | Coolest since: | 1977 |
| 24th Warmest | Warmest since: | 1932 | ||||
| Oct 2019– 5-Month | 37.8°F (3.2°C) | 35.9°F (2.2°C) | 1.9°F | 102nd Coolest | Coolest since: | 1977 |
| 29th Warmest | Warmest since: | 1932 | ||||
| Ties: 1942 | ||||||
| Sep 2019– 6-Month | 43.5°F (6.4°C) | 41°F (5.0°C) | 2.5°F | 115th Coolest | Coolest since: | 1977 |
| 16th Warmest | Warmest since: | 1932 | ||||
| Aug 2019– 7-Month | 47.7°F (8.7°C) | 45.6°F (7.6°C) | 2.1°F | 113th Coolest | Coolest since: | 1977 |
| 18th Warmest | Warmest since: | 1932 | ||||
| Jul 2019– 8-Month | 51.4°F (10.8°C) | 49.4°F (9.7°C) | 2°F | 116th Coolest | Coolest since: | 1977 |
| 15th Warmest | Warmest since: | 1932 | ||||
| Jun 2019– 9-Month | 53.5°F (11.9°C) | 51.8°F (11.0°C) | 1.7°F | 107th Coolest | Coolest since: | 1977 |
| 24th Warmest | Warmest since: | 1932 | ||||
| Ties: 1921, 1950, 1953 | ||||||
| May 2019– 10-Month | 54.4°F (12.4°C) | 52.8°F (11.6°C) | 1.6°F | 104th Coolest | Coolest since: | 1918 |
| 27th Warmest | Warmest since: | 1932 | ||||
| Ties: 1919, 1983 | ||||||
| Apr 2019– 11-Month | 54.3°F (12.4°C) | 52.7°F (11.5°C) | 1.6°F | 110th Coolest | Coolest since: | 1918 |
| 21st Warmest | Warmest since: | 1932 | ||||
| Ties: 1937, 1955, 2008 | ||||||
| Mar 2019– 12-Month | 52.9°F (11.6°C) | 51.6°F (10.9°C) | 1.3°F | 98th Coolest | Coolest since: | 1918 |
| 33rd Warmest | Warmest since: | 2017 | ||||
| Ties: 1955, 1974 | ||||||
| Sep 2018– 18-Month | 49.1°F (9.5°C) | 48.1°F (8.9°C) | 1°F | 100th Coolest | Coolest since: | 1905 |
| 30th Warmest | Warmest since: | 2017 | ||||
| Ties: 1943, 1956, 2001, 2019 | ||||||
| Mar 2018– 24-Month | 52.6°F (11.4°C) | 51.6°F (10.9°C) | 1°F | 97th Coolest | Coolest since: | 1905 |
| 33rd Warmest | Warmest since: | 2017 | ||||
| Ties: 1939, 1987, 2001 | ||||||
| Mar 2017– 36-Month | 52.7°F (11.5°C) | 51.6°F (10.9°C) | 1.1°F | 103rd Coolest | Coolest since: | 1979 |
| 26th Warmest | Warmest since: | 2013, 2018 | ||||
| Ties: 1924, 1988, 2004 | ||||||
| Mar 2016– 48-Month | 53.5°F (11.9°C) | 51.6°F (10.9°C) | 1.9°F | 125th Coolest | Coolest since: | 1905 |
| 3rd Warmest | Warmest since: | 2025 | ||||
| Mar 2015– 60-Month | 53.6°F (12.0°C) | 51.6°F (10.9°C) | 2°F | 125th Coolest | Coolest since: | 1905 |
| 2nd Warmest | Warmest to Date | 2025 | ||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Rankings, published September 2025, retrieved on September 18, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/rankings
