Champaign, IL – A stretch of hot, mostly sunny weather will dominate Champaign and much of central Illinois through the weekend, with afternoon highs near 90°F and a heat index reaching up to 100 by Sunday. According to the National Weather Service, south winds will increase humidity and keep temperatures warm overnight, with lows staying in the lower 70s. The heat peaks Sunday, making it especially important to stay hydrated and avoid prolonged outdoor activity during the afternoon.
Conditions will begin to change Monday afternoon as a cold front brings a 30% chance of showers and thunderstorms, increasing to a 40–50% chance by Monday night and Tuesday. Localized heavy downpours, brief gusty winds, and lightning could disrupt travel during the evening commute, especially along I-57 and in neighborhoods near the University of Illinois campus.
If you have outdoor plans, Saturday and Sunday remain ideal for community events, farmers markets, and back-to-school shopping, but be prepared to move indoors by late Monday as storms approach. Charge electronic devices, monitor local alerts, and review severe weather safety tips ahead of Monday night’s threat.
This hot stretch won’t last—cooler air and drier conditions are expected by midweek. Updates will follow as the next round of storms develops.
Five Day Champaign, IL Forecast:
- Friday: Mostly sunny and hot. High 90°F, low 72°F
- Saturday: Sunny, heat index up to 100. High 91°F, low 72°F
- Sunday: Mostly sunny, breezy and hot. High 90°F, low 72°F
- Monday: Mostly sunny, 30% chance showers/thunderstorms after 1 p.m. High 90°F, low 71°F
- Tuesday: Showers and thunderstorms likely, especially after 1 p.m. High 89°F, low 70°F
