Illinois weather in April: Statewide normals and every place, NOAA 1991-2020
In April, Illinois's statewide normal high is 64°F and normal low 41°F; normal highs run from 55°F in Waukegan to 71°F in Anna (NOAA 1991-2020 normals).
- Statewide normal high
- 64°FApril, 1991-2020
- Statewide normal low
- 41°FApril, 1991-2020
- Statewide normal precipitation
- 4.24 inApril
- Warmest place
- 71°Fnormal high, Anna
- Coolest place
- 55°Fnormal high, Waukegan
Where is Illinois warmest and wettest in April?
Anna has the warmest April afternoons (71°F) and Waukegan the coolest (55°F). Anna gets the most precipitation (5.63 in) and Paw Paw the least (3.20 in). The most snow falls in Mundelein (1.8 inches).
Statewide, April averaged 52.5°F in 2021, 49.6°F in 2022, 53.4°F in 2023, 54.7°F in 2024, 53.9°F in 2025, 58.8°F in 2026, against a 1991-2020 normal of 52.6°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Chicago | 59°F | 40°F | 3.75 | 1.3 |
| Aurora | 60°F | 39°F | 4.05 | 0.6 |
| Joliet | 60°F | 39°F | 3.93 | 0.1 |
| Rockford | 60°F | 39°F | 3.75 | 0.9 |
| Elgin | 59°F | 37°F | 3.96 | 0.8 |
| Springfield | 66°F | 43°F | 3.97 | 0.3 |
| Peoria | 64°F | 42°F | 3.99 | 0.5 |
| Champaign | 65°F | 41°F | 3.68 | – |
| Waukegan | 55°F | 35°F | – | – |
| Bloomington | 62°F | 39°F | 4.08 | – |
| Decatur | 64°F | 42°F | 3.66 | – |
| Wheaton | 63°F | 38°F | 4.10 | 0.3 |
| Normal | 63°F | 38°F | 3.72 | 0.5 |
| Moline | 63°F | 40°F | 3.81 | 1.1 |
| Crystal Lake | 59°F | 37°F | 3.76 | 1.2 |
| Romeoville | 61°F | 40°F | 4.11 | 0.9 |
| Belleville | 71°F | 46°F | 4.90 | 0.0 |
| DeKalb | 59°F | 37°F | 3.56 | 1.3 |
| Quincy | 64°F | 43°F | 3.98 | – |
| Streamwood | 61°F | 35°F | 3.64 | 0.7 |
| Wheeling | 58°F | 39°F | 3.31 | – |
| Rock Island | 61°F | 39°F | 3.81 | – |
| Mundelein | 57°F | 36°F | 3.95 | 1.8 |
| Galesburg | 61°F | 40°F | 3.83 | 0.4 |
| Burbank | 60°F | 42°F | 4.15 | 1.0 |
| Danville | 65°F | 42°F | 4.46 | – |
| West Chicago | 60°F | 38°F | 3.44 | – |
| Alton | 66°F | 45°F | 4.92 | – |
| Lisle | 59°F | 36°F | 3.82 | – |
| Kankakee | 61°F | 39°F | 3.87 | 0.3 |
| Freeport | 58°F | 36°F | 3.66 | 0.8 |
| Carbondale | 68°F | 45°F | 5.34 | – |
| Park Forest | 59°F | 38°F | 4.02 | 0.5 |
| Ottawa | 61°F | 39°F | 3.53 | 0.4 |
| Jacksonville | 65°F | 41°F | 4.46 | – |
| Charleston | 67°F | 44°F | 5.09 | 0.3 |
| Cahokia Heights | 68°F | 46°F | 4.48 | – |
| Mattoon | 64°F | 43°F | 4.14 | – |
| Dixon | 60°F | 39°F | 3.98 | 0.6 |
| Antioch | 56°F | 37°F | – | – |
| Morris | 61°F | 40°F | 3.34 | 0.5 |
| Channahon | 61°F | 40°F | 3.78 | 0.0 |
| Mount Vernon | 65°F | 44°F | 4.96 | 0.0 |
| Lincoln | 64°F | 41°F | 4.24 | 0.0 |
| Effingham | 66°F | 42°F | 4.84 | 0.2 |
| Streator | 62°F | 40°F | 3.73 | 0.7 |
| Rantoul | 64°F | 40°F | 3.98 | – |
| Kewanee | 61°F | 38°F | 3.96 | 1.2 |
| Pontiac | 63°F | 41°F | 3.49 | 0.6 |
| Barrington | 58°F | 37°F | 3.95 | 1.1 |
| Peru | 61°F | 38°F | 3.77 | 0.6 |
| Rochelle | 59°F | 37°F | 3.44 | – |
| Lake Villa | 57°F | 37°F | 4.12 | 1.5 |
| Monmouth | 63°F | 40°F | 3.95 | 1.1 |
| Olney | 66°F | 43°F | 5.02 | 0.0 |
| Jerseyville | 65°F | 42°F | 4.55 | 0.0 |
| Paris | 63°F | 40°F | 4.94 | 0.3 |
| Harrisburg | 69°F | 46°F | 5.26 | – |
| Marengo | 59°F | 36°F | 3.81 | 0.4 |
| Princeton | 62°F | 38°F | 4.03 | 0.9 |
| Vandalia | 65°F | 43°F | 4.86 | – |
| Robinson | 66°F | 43°F | 5.17 | – |
| Salem | 66°F | 44°F | 4.69 | 0.0 |
| Mount Carmel | 67°F | 46°F | 5.08 | 0.0 |
| Benton | 67°F | 46°F | – | – |
| Geneseo | 62°F | 40°F | 3.96 | 0.7 |
| Hillsboro | 68°F | 44°F | 5.03 | – |
| Du Quoin | 68°F | 46°F | 5.35 | 0.1 |
| Carlinville | 65°F | 43°F | 4.67 | 0.0 |
| Pana | 66°F | 41°F | 4.80 | 0.5 |
| Fairfield | 69°F | 47°F | 5.00 | – |
| Marseilles | 61°F | 37°F | 3.59 | 0.3 |
| Hoopeston | 64°F | 41°F | 3.95 | 0.4 |
| Carmi | 68°F | 43°F | 5.17 | 0.0 |
| Tuscola | 64°F | 42°F | 4.52 | 0.2 |
| Flora | 67°F | 44°F | 5.31 | 0.0 |
| Shelbyville | 64°F | 43°F | 4.33 | – |
| Watseka | 62°F | 38°F | 3.65 | 0.3 |
| Paxton | 62°F | 39°F | 3.73 | 0.3 |
| Lawrenceville | 67°F | 45°F | 4.24 | – |
| Sullivan | 65°F | 42°F | 4.48 | 0.2 |
| Anna | 71°F | 46°F | 5.63 | 0.0 |
| Pittsfield | 66°F | 42°F | 4.14 | 0.3 |
| Sparta | 67°F | 43°F | 5.16 | 0.0 |
| Dwight | 61°F | 37°F | 3.54 | 0.6 |
| Morrison | 60°F | 37°F | 3.84 | 0.8 |
| Fulton | 59°F | 40°F | 3.39 | – |
| Aledo | 62°F | 38°F | 4.00 | 0.6 |
| Gibson City | 62°F | 39°F | 3.57 | 0.3 |
| Carlyle | 67°F | 45°F | 4.90 | – |
| Galena | 57°F | 36°F | 3.89 | 1.3 |
| Virden | 67°F | 45°F | 4.23 | 0.0 |
| Nashville | 66°F | 45°F | 4.58 | 0.0 |
| Rushville | 62°F | 42°F | 3.88 | – |
| Knoxville | 62°F | 39°F | 3.95 | 0.4 |
| Havana | 64°F | 41°F | 4.22 | 1.2 |
| Newton | 65°F | 44°F | 5.01 | 0.2 |
| McLeansboro | 68°F | 44°F | 5.29 | 0.0 |
| Galva | 61°F | 38°F | 4.22 | – |
| Casey | 65°F | 43°F | 5.07 | 0.1 |
| Polo | 61°F | 38°F | 3.85 | – |
| White Hall | 64°F | 42°F | 4.41 | 0.4 |
| Petersburg | 64°F | 41°F | 4.09 | 0.5 |
| Mason City | 64°F | 41°F | 3.73 | 0.0 |
| Athens | 64°F | 40°F | 3.93 | – |
| Minonk | 63°F | 39°F | 3.66 | 0.8 |
| Albion | 67°F | 47°F | – | – |
| Lacon | 65°F | 41°F | 4.00 | 0.7 |
| Princeville | 64°F | 39°F | 3.67 | 0.1 |
| Chenoa | 62°F | 39°F | 3.57 | 0.8 |
| Stockton | 59°F | 37°F | 3.93 | 1.3 |
| Cairo | 70°F | 48°F | 5.38 | – |
| Winchester | 65°F | 41°F | 4.40 | – |
| Grayville | 68°F | 45°F | 4.52 | 0.0 |
| Mount Carroll | 61°F | 36°F | 3.90 | 0.8 |
| Neoga | 65°F | 42°F | 4.67 | – |
| Walnut | 61°F | 39°F | 3.35 | 0.6 |
| Palestine | 67°F | 45°F | 5.06 | 0.0 |
| La Harpe | 62°F | 40°F | 3.92 | – |
| Windsor | 64°F | 42°F | 4.51 | 0.3 |
| Morrisonville | 65°F | 43°F | 4.31 | 0.0 |
| Rosiclare | 68°F | 43°F | 5.12 | 0.0 |
| Ramsey | 64°F | 42°F | 4.59 | 0.3 |
| Shabbona | 59°F | 37°F | 3.62 | – |
| Paw Paw | 59°F | 36°F | 3.20 | 0.9 |
| Hennepin | 64°F | 41°F | 3.85 | – |
| Piper City | 65°F | 38°F | 4.02 | 0.9 |
| Ogden | 64°F | 41°F | 3.88 | 0.3 |
| Brookport | 69°F | 46°F | 5.10 | 0.0 |
| Elizabeth | 59°F | 36°F | 3.85 | 1.1 |
| Brownstown | 65°F | 45°F | 4.39 | – |
| Avon | 62°F | 37°F | 3.62 | 1.1 |
| Golden | 64°F | 40°F | – | – |
| New Boston | 62°F | 40°F | 3.56 | – |
| Congerville | 63°F | 41°F | 3.77 | 0.8 |
| Sidell | 62°F | 41°F | 4.15 | 0.4 |
| Altona | 62°F | 37°F | 4.00 | – |
| Prairie City | 64°F | 40°F | 3.79 | 1.0 |
| Perry | 65°F | 42°F | 3.92 | 0.4 |
| Compton | 59°F | 36°F | – | – |
| Gladstone | 62°F | 42°F | 3.77 | 0.3 |
| Bentley | 63°F | 42°F | 4.11 | 0.4 |
| Kaskaskia | 68°F | 44°F | 4.67 | 0.0 |
| Illinois City | 61°F | 39°F | 3.47 | – |
| Cahokia | 68°F | 45°F | 4.63 | 0.3 |
| Chicago Aurora Municipal Airport | 60°F | 37°F | 3.60 | – |
| Chicago Botanic Garden | 57°F | 38°F | 4.00 | 1.1 |
| Chicago Midway Airport | 60°F | 41°F | 3.57 | – |
| Chicago Waukegan Regional Airport | 56°F | 36°F | 3.77 | – |
| Dixon Springs Agricultural Center | 70°F | 46°F | 4.96 | 0.0 |
| Grand Chain Dam 53 | 68°F | 47°F | 5.15 | 0.0 |
| Iuka (12 mi SW) | 66°F | 44°F | 4.81 | 0.0 |
| Little Red School House | 62°F | 39°F | 4.14 | – |
| McHenry W.G. Stratton Lock and Dam | 59°F | 37°F | 3.63 | 1.0 |
| Rend Lake Dam | 68°F | 45°F | 5.43 | – |
| Smithland Lock and Dam | 68°F | 46°F | 5.07 | 0.0 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.