NOAA's National Centers for Environmental Information
Statewide Rankings
Illinois
December 1997 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 1997 1-Month | 32.0°F (0.0°C) | 29.4°F (-1.4°C) | 2.6°F | 81st Coolest | Coolest since: | 1983 |
| 50th Warmest | Warmest since: | 2015 | ||||
| Nov– 2-Month | 35.3°F (1.8°C) | 35.1°F (1.7°C) | 0.2°F | 57th Coolest | Coolest since: | 1950 |
| 74th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 41.8°F (5.4°C) | 41.6°F (5.3°C) | 0.2°F | 68th Coolest | Coolest since: | 1976 |
| 63rd Warmest | Warmest since: | 1931 | ||||
| Sep– 4-Month | 48.0°F (8.9°C) | 47.8°F (8.8°C) | 0.2°F | 61st Coolest | Coolest since: | 1976 |
| 70th Warmest | Warmest since: | 1931 | ||||
| Ties: 1930, 1963 | ||||||
| Aug– 5-Month | 52.6°F (11.4°C) | 52.9°F (11.6°C) | -0.3°F | 49th Coolest | Coolest since: | 1976 |
| 82nd Warmest | Warmest since: | 1931 | ||||
| Jul– 6-Month | 56.3°F (13.5°C) | 56.7°F (13.7°C) | -0.4°F | 46th Coolest | Coolest since: | 1976 |
| 85th Warmest | Warmest since: | 1931 | ||||
| Ties: 1901, 1944, 1963, 1966, 1995 | ||||||
| Jun– 7-Month | 58.4°F (14.7°C) | 58.8°F (14.9°C) | -0.4°F | 44th Coolest | Coolest since: | 1917 |
| 87th Warmest | Warmest since: | 1931 | ||||
| May– 8-Month | 58.3°F (14.6°C) | 59.2°F (15.1°C) | -0.9°F | 28th Coolest | Coolest since: | 1917 |
| 103rd Warmest | Warmest since: | 1931 | ||||
| Ties: 1937, 1961, 1966, 1981 | ||||||
| Apr– 9-Month | 57.1°F (13.9°C) | 58.3°F (14.6°C) | -1.2°F | 21st Coolest | Coolest since: | 1917 |
| 110th Warmest | Warmest since: | 1931 | ||||
| Ties: 1898 | ||||||
| Mar– 10-Month | 55.7°F (13.2°C) | 56.5°F (13.6°C) | -0.8°F | 30th Coolest | Coolest since: | 1917 |
| 101st Warmest | Warmest since: | 2012 | ||||
| Ties: 1929 | ||||||
| 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 | ||||
| Ties: 1920, 1928, 1961, 1968, 1980, 1985 | ||||||
| Jan– 12-Month | 51.0°F (10.6°C) | 51.6°F (10.9°C) | -0.6°F | 41st Coolest | Coolest since: | 1917 |
| 90th Warmest | Warmest since: | 2012 | ||||
| Ties: 1943 | ||||||
| Jul 1996– 18-Month | 52.3°F (11.3°C) | 53.3°F (11.8°C) | -1.0°F | 17th Coolest | Coolest since: | 1904 |
| 113th Warmest | Warmest since: | 2012 | ||||
| Ties: 1929, 1958, 1969, 1993 | ||||||
| Jan 1996– 24-Month | 50.5°F (10.3°C) | 51.6°F (10.9°C) | -1.1°F | 10th Coolest | Coolest since: | 1904, 1979 |
| 120th Warmest | Warmest since: | 2024 | ||||
| Ties: 1924, 1925, 1978 | ||||||
| Jan 1995– 36-Month | 50.9°F (10.5°C) | 51.6°F (10.9°C) | -0.7°F | 20th Coolest | Coolest since: | 1905 |
| 109th Warmest | Warmest since: | 2024 | ||||
| Ties: 1925, 1963, 1970 | ||||||
| Jan 1994– 48-Month | 51.2°F (10.7°C) | 51.6°F (10.9°C) | -0.4°F | 32nd Coolest | Coolest since: | 1905 |
| 96th Warmest | Warmest since: | 2024 | ||||
| Ties: 1898, 1901, 1915, 1971 | ||||||
| Jan 1993– 60-Month | 51.1°F (10.6°C) | 51.6°F (10.9°C) | -0.5°F | 24th Coolest | Coolest since: | 1905 |
| 103rd Warmest | Warmest since: | 2024 | ||||
| Ties: 1899, 1902, 1909, 1929, 1951, 1964, 1971, 1972 | ||||||
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
