Heavy rainfall from scattered thunderstorms is expected across the Southwest, Intermountain West, and Plains. Isolated dry thunderstorms may initiate additional fires across the west. The coastal Carolinas may experience flash floods in the coming days due to repeated thunderstorms. Additionally, a wave of intense summer heat will hit the Southern Plains and central Gulf Coast States this week. Read More >
Central Illinois
Weather Forecast Office
| Month | Average High (°F) |
Average Low (°F) |
Mean Temperature (°F) |
Heating Deg. Days |
Cooling Deg. Days |
Average Precip. (inches) |
Average Snow (inches) |
|---|---|---|---|---|---|---|---|
| January | 34.5 | 17.8 | 26.1 | 1204 | 0 | 2.17 | 5.7 |
| February | 39.5 | 21.6 | 30.6 | 964 | 0 | 1.92 | 6.2 |
| March | 51.7 | 31.1 | 41.4 | 734 | 2 | 2.70 | 1.8 |
| April | 64.4 | 40.8 | 52.6 | 383 | 11 | 4.24 | 0.0 |
| May | 74.8 | 52.4 | 63.6 | 132 | 88 | 4.37 | 0 |
| June | 83.3 | 61.3 | 72.3 | 15 | 234 | 4.16 | 0 |
| July | 85.5 | 64.5 | 75.0 | 2 | 311 | 5.06 | 0 |
| August | 84.0 | 61.3 | 72.6 | 6 | 243 | 3.47 | 0 |
| September | 79.2 | 53.4 | 66.3 | 78 | 117 | 3.30 | 0 |
| October | 66.3 | 41.8 | 54.1 | 357 | 17 | 3.42 | 0.1 |
| November | 51.4 | 32.0 | 41.7 | 700 | 0 | 2.88 | 0.6 |
| December | 39.2 | 23.1 | 31.1 | 1049 | 0 | 2.29 | 4.9 |
| Annual | 62.8 | 41.7 | 52.3 | 5624 | 1014 | 39.60 | 19.3 |
Period used for normals: 1991-2020
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Central Illinois
1362 State Route 10
Lincoln, IL 62656
217-732-7321 (forecast recording) or 217-732-3089
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