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

23°F

-5°C

Humidity 72%
Wind Speed N 20 mph
Barometer 30.34 in (1027.8 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 4 Dec 3:53 am CST
Extended Forecast for

Caseyville IL

  • Today

    Today: Partly sunny, with a high near 24. North wind 5 to 9 mph.

    High: 24 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 12. Northeast wind around 5 mph becoming calm in the evening.

    Low: 12 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 39. Calm wind becoming south around 6 mph in the morning.

    High: 39 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 26. South wind around 6 mph becoming calm after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 38. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 38 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of freezing rain after midnight. Cloudy, with a low around 27. Chance of precipitation is 30%.

    Low: 27 °F

    Cloudy then
    Chance
    Freezing Rain

  • Sunday

    Sunday: A slight chance of rain and snow before noon. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.

    High: 34 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 24. North wind 5 to 9 mph.
Tonight
Partly cloudy, with a low around 12. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 39. Calm wind becoming south around 6 mph in the morning.
Friday Night
Mostly cloudy, with a low around 26. South wind around 6 mph becoming calm after midnight.
Saturday
Partly sunny, with a high near 38. Calm wind becoming northeast around 6 mph in the afternoon.
Saturday Night
A chance of freezing rain after midnight. Cloudy, with a low around 27. Chance of precipitation is 30%.
Sunday
A slight chance of rain and snow before noon. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 47.
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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 4, 2025
Forecast Valid:
4am CST Dec 4, 2025-6pm CST Dec 10, 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