Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

12°F

-11°C

Humidity 84%
Wind Speed S 3 mph
Barometer 30.12 in (1020.5 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 5 Dec 6:53 am CST
Extended Forecast for

Caseyville IL

  • Today

    Today: Sunny, with a high near 41. South wind 3 to 7 mph.

    High: 41 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 29. South wind 5 to 7 mph becoming west after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 39. Light and variable wind becoming east around 5 mph in the afternoon.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow between midnight and 3am, then a chance of rain after 3am.  Mostly cloudy, with a low around 30. East wind around 5 mph.  Chance of precipitation is 40%.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain, mixing with snow after 9am, then gradually ending.  Mostly cloudy, with a high near 39. Southeast wind 5 to 13 mph becoming northwest in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 30%.

    High: 39 °F

    Chance
    Rain/Snow
    then Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 41. South wind 3 to 7 mph.
Tonight
Increasing clouds, with a low around 29. South wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 39. Light and variable wind becoming east around 5 mph in the afternoon.
Saturday Night
A chance of snow between midnight and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 30. East wind around 5 mph. Chance of precipitation is 40%.
Sunday
A chance of rain, mixing with snow after 9am, then gradually ending. Mostly cloudy, with a high near 39. Southeast wind 5 to 13 mph becoming northwest in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Mostly cloudy, with a high near 34.
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ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.66°N 90.06°W (Elev. 433 ft)
6:36 am CST Dec 5, 2025
7am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database