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

73°F

23°C

Humidity 50%
Wind Speed S 5 mph
Barometer 29.76 in (1007.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 21 Mar 8:53 pm CDT
Extended Forecast for

2 Miles WNW Belleville IL

  • Tonight

    Tonight: Clear, with a low around 64. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 64 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 89. Southwest wind 7 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 34 mph.

    Low: 38 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 58. North wind 7 to 9 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. East wind around 6 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 64. Southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 89. Southwest wind 7 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 34 mph.
Monday
Mostly sunny, with a high near 58. North wind 7 to 9 mph.
Monday Night
Mostly cloudy, with a low around 41. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 73.
Wednesday Night
A slight chance of rain and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Thursday
A 20 percent chance of rain and thunderstorms after 1pm. Sunny, with a high near 84.
Thursday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 46.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 57.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 38.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Belleville IL
 38.55°N 90.04°W (Elev. 538 ft)
Last Update:
5:26 pm CDT Mar 21, 2026
Forecast Valid:
9pm CDT Mar 21, 2026-6pm CDT Mar 28, 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