30 cities · avg annual temperature 9.7°C
| City | Population | Avg temp | Since 1900 |
|---|---|---|---|
| Chicago | 2,720,546 | 9.7°C | +2.2° |
| Aurora | 200,661 | 9.0°C | +2.3° |
| Rockford | 148,278 | 8.7°C | +2.3° |
| Joliet | 147,861 | 9.7°C | +2.2° |
| Naperville | 147,100 | 9.3°C | +2.3° |
| Springfield | 116,565 | 11.4°C | +2.1° |
| Peoria | 115,070 | 10.6°C | +2.1° |
| North Peoria | 113,004 | 10.6°C | +2.1° |
| Elgin | 112,111 | 8.5°C | +2.3° |
| Waukegan | 88,475 | 8.8°C | +2.3° |
| Champaign | 86,096 | 10.6°C | +2.1° |
| Cicero | 83,886 | 9.6°C | +2.3° |
| Bloomington | 78,292 | 10.7°C | +2.1° |
| Arlington Heights | 75,926 | 9.3°C | +2.3° |
| Evanston | 75,527 | 9.4°C | +2.3° |
| Schaumburg | 74,693 | 8.8°C | +2.3° |
| Bolingbrook | 74,306 | 9.7°C | +2.2° |
| Decatur | 73,254 | 11.3°C | +2.1° |
| Palatine | 69,308 | 8.8°C | +2.3° |
| Skokie | 64,821 | 9.4°C | +2.3° |
| Des Plaines | 58,677 | 9.3°C | +2.3° |
| Orland Park | 58,619 | 9.9°C | +2.2° |
| Tinley Park | 57,143 | 9.9°C | +2.2° |
| Oak Lawn | 56,781 | 9.9°C | +2.2° |
| Berwyn | 56,368 | 9.6°C | +2.3° |
| Mount Prospect | 54,747 | 9.3°C | +2.3° |
| Normal | 54,373 | 10.5°C | +2.1° |
| Wheaton | 53,715 | 9.3°C | +2.3° |
| Oak Park | 52,287 | 9.6°C | +2.3° |
| Hoffman Estates | 52,138 | 8.8°C | +2.3° |