Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

33°F

1°C

Humidity 30%
Wind Speed SW 3 mph
Barometer 30.27 in (1025.5 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 17 Mar 2:53 pm CDT
Extended Forecast for

Caseyville IL

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 1am.  Cloudy, with a low around 31. Southeast wind 6 to 13 mph, with gusts as high as 26 mph.

    Low: 31 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 64. South wind 9 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 64 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 46. Light and variable wind becoming north around 5 mph after midnight.

    Low: 46 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 5 to 8 mph becoming northwest in the afternoon.

    High: 73 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45. North wind around 6 mph becoming calm  after midnight.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of snow, mainly before 1am. Cloudy, with a low around 31. Southeast wind 6 to 13 mph, with gusts as high as 26 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 64. South wind 9 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
Increasing clouds, with a low around 46. Light and variable wind becoming north around 5 mph after midnight.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 5 to 8 mph becoming northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 45. North wind around 6 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.64°N 90.03°W (Elev. 446 ft)
2:56 pm CDT Mar 17, 2026
3pm CDT Mar 17, 2026-6pm CDT Mar 24, 2026
 
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Additional Resources

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