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.

Partly Cloudy

38°F

3°C

Humidity 97%
Wind Speed Calm
Barometer 30.05 in (1017.5 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 10 Jan 3:53 am CST
Extended Forecast for

Caseyville IL

  • Today

    Today: A 40 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 47 °F

    Chance Rain
    then Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 9 to 15 mph, with gusts as high as 26 mph.

    Low: 26 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 39. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 27. Southwest wind 3 to 7 mph.

    Low: 27 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 52. West wind 6 to 9 mph.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Today
A 40 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 9 to 15 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 39. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Clear, with a low around 27. Southwest wind 3 to 7 mph.
Monday
Sunny, with a high near 52. West wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.64°N 90.03°W (Elev. 446 ft)
Last Update:
4:36 am CST Jan 10, 2026
Forecast Valid:
5am CST Jan 10, 2026-6pm CST Jan 16, 2026
 
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