Friday
Slight chance of thunderstorms
High:
99°F
A 20 percent chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 114. South wind 3 to 6 mph.
Belleville, IL Weather - Tomorrow’s Forecast
Friday Night
Mostly clear
Overnight low:
77°F
Mostly clear, with a low around 77. Southeast wind 3 to 8 mph.