National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

57°F

14°C

Humidity 90%
Wind Speed Calm
Barometer 30.08 in (1018.2 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 5 Oct 2:53 am CDT
Extended Forecast for

Belleville IL

  • Overnight

    Overnight: Clear, with a low around 54. Light south wind.

    Low: 54 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Increasing clouds, with a high near 85. South wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 54. Light south wind.
Sunday
Sunny, with a high near 89. South wind 5 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 64. South wind around 6 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Increasing clouds, with a high near 85. South wind 5 to 7 mph. Chance of precipitation is 40%.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 6 mph becoming calm in the evening.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 90.01°W (Elev. 535 ft)
Last Update:
3:16 am CDT Oct 5, 2025
Forecast Valid:
3am CDT Oct 5, 2025-6pm CDT Oct 11, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation