Central Illinois is in for a sweltering weekend as dangerous heat builds across the region. Springfield, Peoria, and Champaign will face intense heat and humidity, with temperatures soaring into the mid-90s and heat index values pushing into the triple digits. The worst day is expected to be Sunday, when it could feel as hot as 104°F.
Dangerous Heat Building Across the Weekend
According to the National Weather Service in Lincoln, the heat will peak on Sunday, but uncomfortable conditions will stick around through at least Tuesday.
Here’s what to expect:
Saturday: Heat index between 95°F and 100°F
Sunday: Heat index reaching 102°F to 104°F
Monday–Tuesday: Highs in the mid-90s with continued humidity
Even though the air temperatures will stay in the 90s, high dew points in the mid to upper 60s will make it feel much hotter and more oppressive.
Heat Safety is a Priority
The high heat and humidity can be dangerous — especially for young children, seniors, and people who work or exercise outdoors.
Tips to stay safe during extreme heat:
Drink plenty of water, even if you’re not thirsty
Avoid being outside during the peak heat hours (12 PM–5 PM)
Use air conditioning or fans to cool down
Wear light, loose-fitting clothing
Never leave children or pets in vehicles
Check in on elderly neighbours and relatives
If you begin to feel dizzy, weak, or nauseous, it could be a sign of heat exhaustion — seek shade, hydrate, and rest immediately.
No Rain to Break the Heat
Unfortunately, there is little to no chance of rain through early next week. With dry skies and persistent humidity, the heat will remain trapped in the region. While brief clouds may bring slight relief at times, no meaningful cool-down is expected before mid-week.
Officials warn that additional heat advisories may be issued if conditions worsen or if the heat index climbs higher than forecasted.
Extended Forecast for Central Illinois
| Day | Weather | High Temp | Heat Index |
|---|---|---|---|
| Saturday | Sunny, very humid | 94°F | 95–100°F |
| Sunday | Hottest day, mostly sunny | 95°F | 102–104°F |
| Monday | Hot, partly cloudy | 94°F | 98–100°F |
| Tuesday | Continued heat | 93°F | Around 100°F |
| Wednesday | Slightly cooler | 89°F | Upper 90s |
Areas Affected
The heat wave will impact much of central Illinois, especially:
Springfield
Peoria
Champaign
Surrounding towns and rural areas
Urban areas may feel even hotter due to the heat island effect, where buildings and concrete trap heat longer into the evening.
A dangerous heat wave is taking hold across central Illinois, with feels-like temperatures climbing over 100°F this weekend. The hottest day will be Sunday, but the uncomfortable weather will stick around through Tuesday. With no rain in sight, now’s the time to take precautions, check on others, and stay cool. Be smart, stay safe, and keep an eye on updated advisories from local weather services.
