Springfield, Illinois –Residents across Illinois are bracing for seasonably hot, humid weather this week as temperatures climb into the upper 80s and low 90s, with daily chances for thunderstorms expected from Tuesday through Thursday.
According to the National Weather Service in Lincoln, periods of scattered showers and storms are likely each afternoon, with the highest risk for severe weather and heavy downpours (60% chance) arriving Thursday. Monday morning brings widespread fog, especially near rivers and low-lying areas, making for slow commutes in Springfield, Bloomington, and Decatur.
Thunderstorm chances increase Tuesday and Wednesday, with a 40% likelihood both days. Localized heavy rainfall may lead to ponding on roads like I-55 and Route 51. Afternoon highs will reach near 90°F, and overnight lows stay warm, providing little relief from the humidity. By Thursday, expect more widespread storms across Peoria, Champaign, and the Illinois River Valley, with outdoor plans and travel potentially disrupted.
Residents should stay weather-aware, charge mobile devices, and avoid flooded streets. Those sensitive to heat are urged to drink plenty of water and limit strenuous activities during peak afternoon hours.
More storms are possible into Friday, though rain chances drop slightly. Additional weather alerts may be issued as conditions develop.
5-Day Illinois Weather Forecast:
- Monday: Morning fog, partly sunny, high 87°F / low 69°F
- Tuesday: Scattered storms (40%), high 88°F / low 71°F
- Wednesday: Isolated storms (40%), high 90°F / low 73°F
- Thursday: Thunderstorms likely (60%), high 89°F / low 70°F
- Friday: Partly cloudy, lingering showers (30%), high 84°F / low 70°F
