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.

Overcast

24°F

-4°C

Humidity 77%
Wind Speed Calm
Barometer 30.47 in (1032.3 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 1 Dec 3:53 am CST
Extended Forecast for

Caseyville IL

  • Today

    Today: Snow likely, mainly after 5pm. Cloudy, with a high near 30. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%. Total daytime snow accumulation of less than a half inch possible.

    High: 30 °F

    Mostly Cloudy
    then Snow
    Likely

  • Tonight

    Tonight: Snow, mainly before midnight. Low around 20. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 20 °F

    Snow then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 31. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 31 °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 16.

    Low: 16 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: A 30 percent chance of snow. Mostly cloudy, with a high near 35.

    High: 35 °F

    Chance Snow

Detailed Forecast

Today
Snow likely, mainly after 5pm. Cloudy, with a high near 30. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow, mainly before midnight. Low around 20. Calm wind becoming northwest 5 to 7 mph after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 31. Northwest wind around 6 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 16.
Thursday
Mostly sunny, with a high near 23.
Thursday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 14.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
Friday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 26. Chance of precipitation is 20%.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly cloudy, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.66°N 90.06°W (Elev. 433 ft)
Last Update:
3:16 am CST Dec 1, 2025
Forecast Valid:
4am CST Dec 1, 2025-6pm CST Dec 7, 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