A cold front is sliding across central Illinois this week, bringing with it a refreshing drop in humidity and cooler overnight temperatures. While a few thunderstorms may pop up this evening—especially south of Interstate 70—most areas can expect a calm and comfortable stretch of weather through midweek.
Evening Storms Possible South of I-70
According to the National Weather Service in Lincoln, areas south of I-70 may see some scattered thunderstorms this evening as the cold front slowly passes through. These storms will be brief and are not expected to be severe, but travelers should stay alert for slick roads or minor delays.
By late tonight, the front will move south of the area, allowing a more seasonable air mass to settle in. Overnight lows will dip to around 66–69°F, providing a more comfortable night for most of central Illinois.
Midweek: Cooler, Drier, and Sunny
Starting Wednesday, skies will turn mostly sunny and humidity levels will drop noticeably. Daytime highs will stay in the low to mid-80s, and nights will be cooler than recent days. This dry, calm stretch of weather will continue through Friday, with only a very slight (less than 10%) chance of rain.
Highlights for Midweek:
Wednesday: Mostly sunny, highs 81–85°F, lows 60–65°F
Thursday: Sunny, cooler at night, highs 80–85°F, lows 59–64°F
Friday: Mostly sunny, warmer but still dry, highs 82–87°F, lows 62–67°F
Lower humidity will make for pleasant afternoons and crisp nights—ideal for evening walks, outdoor dining, or catching up on yardwork.
Weekend Weather: Watch for Storms Saturday
The next change in the forecast arrives on Saturday, when another cold front is expected to push across the state. This system could bring a slight chance of afternoon and evening thunderstorms, especially in central Illinois. While not guaranteed, residents planning outdoor events should monitor the forecast and be ready to adjust plans if storms move in.
Storm warnings or advisories may be issued by Saturday night, depending on how the front develops.
Five-Day Forecast for Springfield, IL
| Day | Forecast | Highs (°F) | Lows (°F) |
|---|---|---|---|
| Tonight | Few storms south of I-70, turning dry | — | 66–69 |
| Wednesday | Mostly sunny, less humid | 81–85 | 60–65 |
| Thursday | Sunny and comfortable | 80–85 | 59–64 |
| Friday | Mostly sunny, slightly warmer | 82–87 | 62–67 |
| Saturday | Slight chance of storms, warm | 80–87 | — |
This week’s cold front brings some welcome relief to central Illinois, with cooler nights and lower humidity making the midweek forecast one of the most comfortable stretches in recent weeks. While a few storms may develop tonight and again by Saturday, most days will be sunny, dry, and perfect for outdoor plans. Just keep an eye on the weekend forecast in case conditions change quickly.
