NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
April 1940 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| April 1940 1-Month | 49.6°F (9.8°C) | 51.5°F (10.8°C) | -1.9°F | 30th Coolest | Coolest since: | 1907 |
| 101st Warmest | Warmest since: | 2010 | ||||
| Mar– 2-Month | 43.1°F (6.2°C) | 45.7°F (7.6°C) | -2.6°F | 22nd Coolest | Coolest since: | 1926 |
| 109th Warmest | Warmest since: | 2012 | ||||
| Feb– 3-Month | 38.4°F (3.6°C) | 40.2°F (4.6°C) | -1.8°F | 37th Coolest | Coolest since: | 1978 |
| 94th Warmest | Warmest since: | 2012 | ||||
| Jan– 4-Month | 32.1°F (0.1°C) | 36.5°F (2.5°C) | -4.4°F | 9th Coolest | Coolest since: | 1912 |
| 122nd Warmest | Warmest since: | 2012 | ||||
| Dec 1939– 5-Month | 32.5°F (0.3°C) | 35.1°F (1.7°C) | -2.6°F | 15th Coolest | Coolest since: | 1978 |
| 115th Warmest | Warmest since: | 2012 | ||||
| Nov 1939– 6-Month | 33.7°F (0.9°C) | 36.0°F (2.2°C) | -2.3°F | 17th Coolest | Coolest since: | 1904 |
| 113th Warmest | Warmest since: | 2012 | ||||
| Oct 1939– 7-Month | 37.0°F (2.8°C) | 38.7°F (3.7°C) | -1.7°F | 20th Coolest | Coolest since: | 1904 |
| 110th Warmest | Warmest since: | 2012 | ||||
| Sep 1939– 8-Month | 41.2°F (5.1°C) | 42.1°F (5.6°C) | -0.9°F | 29th Coolest | Coolest since: | 1904 |
| 101st Warmest | Warmest since: | 2017 | ||||
| Aug 1939– 9-Month | 44.7°F (7.1°C) | 45.6°F (7.6°C) | -0.9°F | 29th Coolest | Coolest since: | 1904 |
| 101st Warmest | Warmest since: | 2017 | ||||
| Ties: 1917 | ||||||
| Jul 1939– 10-Month | 47.8°F (8.8°C) | 48.6°F (9.2°C) | -0.8°F | 31st Coolest | Coolest since: | 1904 |
| 99th Warmest | Warmest since: | 2012 | ||||
| Jun 1939– 11-Month | 50.1°F (10.1°C) | 50.7°F (10.4°C) | -0.6°F | 39th Coolest | Coolest since: | 1904 |
| 91st Warmest | Warmest since: | 2017 | ||||
| May 1939– 12-Month | 51.3°F (10.7°C) | 51.6°F (10.9°C) | -0.3°F | 43rd Coolest | Coolest since: | 1918 |
| 87th Warmest | Warmest since: | 2012, 2017 | ||||
| Nov 1938– 18-Month | 46.7°F (8.2°C) | 46.4°F (8.0°C) | 0.3°F | 71st Coolest | Coolest since: | 1905 |
| 58th Warmest | Warmest since: | 2017 | ||||
| May 1938– 24-Month | 52.2°F (11.2°C) | 51.6°F (10.9°C) | 0.6°F | 84th Coolest | Coolest since: | 1905 |
| 45th Warmest | Warmest since: | 2017 | ||||
| May 1937– 36-Month | 52.3°F (11.3°C) | 51.6°F (10.9°C) | 0.7°F | 88th Coolest | Coolest since: | 1979 |
| 40th Warmest | Warmest since: | 2018, 2024 | ||||
| May 1936– 48-Month | 52.5°F (11.4°C) | 51.6°F (10.9°C) | 0.9°F | 96th Coolest | Coolest since: | 1980 |
| 31st Warmest | Warmest since: | 2019 | ||||
| May 1935– 60-Month | 51.8°F (11.0°C) | 51.6°F (10.9°C) | 0.2°F | 66th Coolest | Coolest since: | 1906 |
| 60th Warmest | Warmest since: | 2020, 2024 | ||||
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
