Springfield, Illinois – Drivers and residents across central Illinois are facing another round of intense heat and daily storm chances through Thursday, with a major cooldown expected by Friday morning.
According to the National Weather Service in Lincoln, hot and humid air will push heat index values to between 100 and 105 degrees for much of central Illinois through Wednesday evening, especially near and south of Interstate 70. Scattered thunderstorms—some strong to severe—are likely each afternoon and evening through Thursday, with the highest chances (50-70%) on Wednesday.
Areas including Decatur, Bloomington, Peoria, and Champaign could see downed limbs, localized flooding, and quick power outages. Outdoor workers and travelers should plan for dangerous heat and possible road delays from storms. Residents are urged to limit outdoor activity during peak heat, stay hydrated, and have multiple ways to receive weather alerts.
By Thursday night, showers and storms will taper off as a cooler, drier air mass arrives. Highs will drop to the upper 70s and low 80s Friday and Saturday, bringing a much-needed break from the recent humidity. The National Weather Service warns that additional advisories may be issued if new storms develop.
Warnings remain in effect through Thursday night. Monitor local updates for the latest storm watches and potential alerts into the weekend.
Five-Day Forecast: Central Illinois
- Tuesday:
- Scattered storms (30–40%)
- Heat index 100–105°
- Highs: 90–95° | Lows: 70–75°
- Wednesday:
- Showers/storms (50–70%), highest south of I-70
- Heat index 100–105°
- Highs: 80–90° | Lows: 65–75°
- Thursday:
- Storms ending later (30–50%)
- Cooler by evening
- Highs: 75–85° | Lows: 55–65°
- Friday:
- Pleasant, less humid
- Highs: 75–80° | Lows: 55–60°
- Saturday:
- Mostly sunny, pleasant
- Highs: 75–80° | Lows: 55–60°
