Illinois weather in January: Statewide normals and every place, NOAA 1991-2020
In January, Illinois's statewide normal high is 35°F and normal low 19°F; normal highs run from 27°F in Galena to 45°F in Anna (NOAA 1991-2020 normals).
- Statewide normal high
- 35°FJanuary, 1991-2020
- Statewide normal low
- 19°FJanuary, 1991-2020
- Statewide normal precipitation
- 2.31 inJanuary
- Warmest place
- 45°Fnormal high, Anna
- Coolest place
- 27°Fnormal high, Galena
Where is Illinois warmest and wettest in January?
Anna has the warmest January afternoons (45°F) and Galena the coolest (27°F). Rosiclare gets the most precipitation (3.90 in) and Stockton the least (1.17 in). The most snow falls in Lake Villa (15.7 inches).
Statewide, January averaged 29.5°F in 2021, 22.2°F in 2022, 34.4°F in 2023, 26.5°F in 2024, 23.0°F in 2025, 24.4°F in 2026, against a 1991-2020 normal of 26.7°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Chicago | 32°F | 19°F | 1.99 | 11.3 |
| Aurora | 31°F | 16°F | 1.86 | 9.1 |
| Joliet | 31°F | 17°F | 1.99 | 5.0 |
| Rockford | 29°F | 15°F | 1.60 | 10.9 |
| Elgin | 30°F | 14°F | 2.02 | 9.5 |
| Springfield | 36°F | 20°F | 2.03 | 6.7 |
| Peoria | 34°F | 18°F | 2.06 | 7.7 |
| Champaign | 34°F | 18°F | 2.07 | – |
| Waukegan | 30°F | 16°F | – | – |
| Bloomington | 31°F | 16°F | 2.40 | – |
| Decatur | 35°F | 20°F | 1.99 | – |
| Wheaton | 33°F | 17°F | 2.12 | 9.3 |
| Normal | 33°F | 16°F | 2.43 | 7.5 |
| Moline | 32°F | 15°F | 1.66 | 10.8 |
| Crystal Lake | 32°F | 14°F | 1.97 | 10.0 |
| Romeoville | 32°F | 16°F | 2.19 | 10.6 |
| Belleville | 43°F | 24°F | 2.56 | 3.4 |
| DeKalb | 28°F | 13°F | 1.69 | 10.2 |
| Quincy | 35°F | 19°F | 1.57 | – |
| Streamwood | 32°F | 14°F | 1.90 | 11.9 |
| Wheeling | 32°F | 18°F | 1.33 | – |
| Rock Island | 31°F | 13°F | 1.49 | – |
| Mundelein | 29°F | 14°F | 1.76 | 11.0 |
| Galesburg | 30°F | 14°F | 1.69 | 9.0 |
| Burbank | 33°F | 20°F | 2.30 | 12.5 |
| Danville | 35°F | 20°F | 2.47 | – |
| West Chicago | 31°F | 16°F | 1.27 | – |
| Alton | 39°F | 22°F | 2.53 | – |
| Lisle | 32°F | 15°F | 2.19 | – |
| Kankakee | 33°F | 16°F | 2.37 | 8.1 |
| Freeport | 28°F | 11°F | 1.58 | 9.7 |
| Carbondale | 42°F | 25°F | 2.79 | – |
| Park Forest | 31°F | 15°F | 2.49 | 10.2 |
| Ottawa | 31°F | 15°F | 1.78 | 9.2 |
| Jacksonville | 35°F | 18°F | 2.21 | – |
| Charleston | 38°F | 21°F | 2.54 | 8.1 |
| Cahokia Heights | 40°F | 24°F | 2.46 | – |
| Mattoon | 35°F | 20°F | 2.04 | – |
| Dixon | 29°F | 14°F | 1.97 | 13.0 |
| Antioch | 30°F | 15°F | – | – |
| Morris | 31°F | 16°F | 2.09 | 7.4 |
| Channahon | 32°F | 17°F | 2.08 | 6.4 |
| Mount Vernon | 39°F | 22°F | 2.60 | 3.2 |
| Lincoln | 35°F | 18°F | 2.17 | 5.7 |
| Effingham | 37°F | 20°F | 2.93 | 5.3 |
| Streator | 32°F | 16°F | 2.56 | 9.6 |
| Rantoul | 34°F | 16°F | 2.54 | – |
| Kewanee | 30°F | 14°F | 1.89 | 8.7 |
| Pontiac | 32°F | 17°F | 1.99 | 6.7 |
| Barrington | 29°F | 13°F | 2.07 | 12.6 |
| Peru | 30°F | 14°F | 1.81 | 8.6 |
| Rochelle | 28°F | 12°F | 1.78 | – |
| Lake Villa | 30°F | 15°F | 2.07 | 15.7 |
| Monmouth | 31°F | 15°F | 1.85 | 8.7 |
| Olney | 38°F | 21°F | 3.52 | 3.6 |
| Jerseyville | 36°F | 19°F | 2.45 | 4.3 |
| Paris | 34°F | 17°F | 2.81 | 8.6 |
| Harrisburg | 43°F | 24°F | 3.79 | – |
| Marengo | 29°F | 13°F | 1.67 | 8.0 |
| Princeton | 30°F | 14°F | 1.96 | 8.6 |
| Vandalia | 37°F | 21°F | 2.97 | – |
| Robinson | 37°F | 20°F | 3.11 | – |
| Salem | 38°F | 21°F | 3.07 | 3.9 |
| Mount Carmel | 40°F | 25°F | 3.58 | 2.3 |
| Benton | 41°F | 25°F | – | – |
| Geneseo | 31°F | 15°F | 1.64 | 9.8 |
| Hillsboro | 38°F | 21°F | 2.52 | – |
| Du Quoin | 40°F | 24°F | 3.16 | 3.8 |
| Carlinville | 36°F | 19°F | 2.28 | 5.8 |
| Pana | 37°F | 19°F | 2.78 | 5.1 |
| Fairfield | 41°F | 25°F | 3.33 | – |
| Marseilles | 31°F | 14°F | 1.95 | 8.4 |
| Hoopeston | 34°F | 18°F | 2.12 | 6.5 |
| Carmi | 41°F | 21°F | 3.50 | 2.5 |
| Tuscola | 34°F | 18°F | 2.44 | 5.0 |
| Flora | 39°F | 21°F | 2.95 | 3.1 |
| Shelbyville | 36°F | 19°F | 2.60 | – |
| Watseka | 33°F | 16°F | 2.07 | 5.4 |
| Paxton | 32°F | 15°F | 2.03 | 4.9 |
| Lawrenceville | 39°F | 23°F | 3.16 | – |
| Sullivan | 35°F | 19°F | 2.41 | 5.2 |
| Anna | 45°F | 25°F | 3.53 | 2.6 |
| Pittsfield | 37°F | 19°F | 2.03 | 4.0 |
| Sparta | 40°F | 22°F | 3.11 | 3.5 |
| Dwight | 31°F | 14°F | 1.96 | 7.9 |
| Morrison | 29°F | 12°F | 1.51 | 10.4 |
| Fulton | 29°F | 14°F | 1.40 | – |
| Aledo | 31°F | 13°F | 1.67 | 6.2 |
| Gibson City | 32°F | 16°F | 1.95 | 6.7 |
| Carlyle | 39°F | 22°F | 3.05 | – |
| Galena | 27°F | 10°F | 1.23 | 10.3 |
| Virden | 36°F | 21°F | 1.97 | 6.7 |
| Nashville | 39°F | 21°F | 2.68 | 3.7 |
| Rushville | 33°F | 17°F | 1.78 | – |
| Knoxville | 32°F | 14°F | 2.09 | 6.4 |
| Havana | 34°F | 16°F | 2.20 | 9.7 |
| Newton | 37°F | 22°F | 3.22 | 5.3 |
| McLeansboro | 41°F | 22°F | 3.55 | 3.7 |
| Galva | 30°F | 13°F | 1.62 | – |
| Casey | 38°F | 19°F | 3.25 | 5.0 |
| Polo | 30°F | 13°F | 1.94 | – |
| White Hall | 35°F | 18°F | 2.06 | 6.3 |
| Petersburg | 34°F | 17°F | 2.02 | 5.4 |
| Mason City | 33°F | 16°F | 2.34 | 5.5 |
| Athens | 35°F | 18°F | 2.20 | – |
| Minonk | 33°F | 15°F | 1.99 | 5.9 |
| Albion | 40°F | 23°F | – | – |
| Lacon | 34°F | 18°F | 2.07 | 8.1 |
| Princeville | 33°F | 15°F | 2.18 | 5.4 |
| Chenoa | 32°F | 15°F | 2.17 | 5.3 |
| Stockton | 28°F | 12°F | 1.17 | 10.7 |
| Cairo | 43°F | 26°F | 3.80 | – |
| Winchester | 36°F | 18°F | 2.26 | – |
| Grayville | 41°F | 24°F | 3.22 | 2.3 |
| Mount Carroll | 31°F | 11°F | 1.66 | 10.2 |
| Neoga | 37°F | 19°F | 2.66 | – |
| Walnut | 29°F | 13°F | 1.52 | 12.7 |
| Palestine | 38°F | 23°F | 3.48 | 4.3 |
| La Harpe | 32°F | 15°F | 1.60 | – |
| Windsor | 35°F | 19°F | 2.64 | 5.2 |
| Morrisonville | 36°F | 19°F | 2.18 | 5.9 |
| Rosiclare | 41°F | 22°F | 3.90 | 0.9 |
| Ramsey | 35°F | 19°F | 2.84 | 3.6 |
| Shabbona | 28°F | 13°F | 1.67 | – |
| Paw Paw | 28°F | 12°F | 1.60 | 9.6 |
| Hennepin | 32°F | 17°F | 1.95 | – |
| Piper City | 35°F | 16°F | 3.40 | 8.6 |
| Ogden | 34°F | 18°F | 2.38 | 5.9 |
| Brookport | 43°F | 25°F | 3.72 | 0.7 |
| Elizabeth | 28°F | 10°F | 1.43 | 8.4 |
| Brownstown | 37°F | 21°F | 2.82 | – |
| Avon | 31°F | 13°F | 1.83 | 7.4 |
| Golden | 34°F | 16°F | – | – |
| New Boston | 32°F | 15°F | 1.31 | – |
| Congerville | 33°F | 17°F | 2.05 | 6.8 |
| Sidell | 33°F | 17°F | 2.35 | 7.1 |
| Altona | 30°F | 13°F | 1.82 | – |
| Prairie City | 33°F | 16°F | 1.91 | 5.7 |
| Perry | 37°F | 18°F | 1.96 | 6.1 |
| Compton | 28°F | 12°F | – | – |
| Gladstone | 32°F | 16°F | 1.39 | 4.9 |
| Bentley | 34°F | 18°F | 1.67 | 7.6 |
| Kaskaskia | 40°F | 24°F | 2.73 | 1.4 |
| Illinois City | 31°F | 13°F | 1.18 | – |
| Cahokia | 41°F | 22°F | 2.67 | 4.9 |
| Chicago Aurora Municipal Airport | 31°F | 15°F | 1.30 | – |
| Chicago Botanic Garden | 32°F | 16°F | 2.10 | 11.3 |
| Chicago Midway Airport | 33°F | 19°F | 1.48 | – |
| Chicago Waukegan Regional Airport | 31°F | 16°F | 1.41 | – |
| Dixon Springs Agricultural Center | 43°F | 26°F | 3.84 | 1.7 |
| Grand Chain Dam 53 | 43°F | 26°F | 4.23 | 2.1 |
| Iuka (12 mi SW) | 39°F | 21°F | 2.87 | 3.4 |
| Little Red School House | 33°F | 15°F | 2.30 | – |
| McHenry W.G. Stratton Lock and Dam | 31°F | 13°F | 1.65 | 11.0 |
| Rend Lake Dam | 40°F | 22°F | 3.18 | – |
| Smithland Lock and Dam | 43°F | 26°F | 3.71 | 0.4 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.