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

58°F

14°C

Humidity 65%
Wind Speed S 7 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 4 Nov 7:53 pm CST
Extended Forecast for

Caseyville IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 52. South wind 8 to 11 mph.

    Low: 52 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 39. North wind 5 to 7 mph becoming light and variable after midnight.

    Low: 39 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 64. Southeast wind 5 to 14 mph, with gusts as high as 21 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 54. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before noon. Mostly sunny, with a high near 71.

    High: 71 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 52. South wind 8 to 11 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Clear, with a low around 39. North wind 5 to 7 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 64. Southeast wind 5 to 14 mph, with gusts as high as 21 mph.
Thursday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 54. South wind around 10 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers before noon. Mostly sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 46.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.64°N 90.03°W (Elev. 446 ft)
Last Update:
4:46 pm CST Nov 4, 2025
Forecast Valid:
8pm CST Nov 4, 2025-6pm CST Nov 11, 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