Springfield, Ill. – A stretch of hot, muggy weather continues across central and southeast Illinois through Monday, with heat indices making outdoor activity difficult and potentially dangerous. Temperatures are expected to stay in the mid-90s through the start of the week before conditions ease midweek.
According to the National Weather Service in Lincoln, a slim chance of storms tonight could briefly cool the region, but the odds remain low at 20 percent. Highs on Sunday will again reach the low to mid-90s, with humidity keeping overnight lows in the mid-70s. Slight storm chances persist Sunday afternoon and evening, but forecasters say the best opportunity for scattered thunderstorms will arrive Tuesday into Wednesday.
The heat will be felt along Interstates 55 and 72, especially in cities like Springfield, Decatur, and Effingham, where air conditioning will be crucial for residents without adequate cooling. Outdoor workers, athletes, and vulnerable populations are urged to limit time outside during peak afternoon hours, drink plenty of water, and never leave children or pets inside parked vehicles.
By Wednesday, highs are forecast to fall back into the low-80s, bringing some relief along with another round of scattered morning storms. Conditions look to remain milder into Thursday, with highs holding steady in the low-80s under partly sunny skies.
