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

31°F

-1°C

Humidity 38%
Wind Speed NW 20 G 28 mph
Barometer 30.47 in (1032.2 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 22 Feb 5:53 pm CST
Extended Forecast for

Belleville IL

  • Tonight

    Tonight: Increasing clouds, with a low around 16. Northwest wind 16 to 18 mph, with gusts as high as 30 mph.

    Low: 16 °F

    Increasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 31. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. South wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.

    High: 52 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 16. Northwest wind 16 to 18 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 31. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.
Tuesday
Mostly cloudy, with a high near 52. South wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 55.
Wednesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 29.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 33.
Sunday
A 20 percent chance of rain. Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 89.98°W (Elev. 509 ft)
Last Update:
3:11 pm CST Feb 22, 2026
Forecast Valid:
6pm CST Feb 22, 2026-6pm CST Mar 1, 2026
 
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