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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Light Snow Fog/Mist

26°F

-3°C

Humidity 92%
Wind Speed Calm
Barometer 30.08 in (1019.2 mb)
Dewpoint 24°F (-4°C)
Visibility 2.50 mi
Last update 1 Dec 8:53 pm CST
Extended Forecast for

Belleville IL

Winter Weather Advisory December 1, 09:38pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 1, 09:38pm until December 2, 12:00am

    NOW until 12:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 20 °F

    Snow then
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 28. Northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 28 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 40. South wind 5 to 7 mph becoming west in the afternoon.

    High: 40 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 15. North wind 5 to 10 mph.

    Low: 15 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of snow before noon. Mostly sunny, with a high near 39.

    High: 39 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Tonight
Snow, mainly before midnight. Low around 20. Northwest wind 3 to 7 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 28. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Calm wind becoming south around 6 mph after midnight.
Wednesday
Partly sunny, with a high near 40. South wind 5 to 7 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 15. North wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 22.
Thursday Night
Partly cloudy, with a low around 12.
Friday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly cloudy, with a high near 37.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 89.98°W (Elev. 509 ft)
Last Update:
9:06 pm CST Dec 1, 2025
Forecast Valid:
9pm CST Dec 1, 2025-6pm CST Dec 8, 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