Weather forecast for: Belleville IL
Last Update: 1:26 pm CDT Sep 11, 2026
This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Cloudy, with a high near 83. Southeast wind around 7 mph.
Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Patchy fog after 2am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday: Mostly sunny, with a high near 91. Calm wind becoming west around 6 mph in the morning.
Saturday Night: Partly cloudy, with a low around 70. Light and variable wind.
Sunday: Mostly sunny, with a high near 91. Calm wind becoming northwest around 6 mph in the afternoon.
Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Monday: Mostly sunny, with a high near 90.
Monday Night: Mostly clear, with a low around 70.
Tuesday: Sunny, with a high near 96.
Tuesday Night: Partly cloudy, with a low around 72.
Wednesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Wednesday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
WeatherWorld.com
City of Belleville, IL
