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City of Belleville, ILBelleville, IL 7-Day Weather Forecast
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Belleville Weather Forecast
Belleville, IL Weather Forecast Date: 822 PM CDT Sun Sep 20 2026
Weather forecast for Belleville, IL
Tonight Lo: 69°F Lo: 21°C |
Tonight... Showers likely with a chance of thunderstorms. Lows in the upper 60s. North winds 5 to 10 mph. Gusts up to 25 mph this evening. Chance of rain 70%. |
Mon Hi: 75°FHi: 24°C Lo: 61°F Lo: 16°C |
Monday... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning. Patchy fog in the morning. Much cooler with highs in the mid 70s. North winds 5 to 10 mph. Chance of rain 40%. |
Tue Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Tuesday... Partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph. |
Wed Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Wednesday... Mostly sunny. Highs in the mid 70s. |
| Thu Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Thursday... Mostly sunny. Highs in the mid 70s. |
| Fri Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Friday... Mostly cloudy. Lows in the mid 50s. Highs in the upper 70s. |
Sat Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Saturday... Mostly cloudy with a 20% chance of showers. Lows in the upper 50s. Highs in the upper 70s. |
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