National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Rain Fog/Mist

64°F

18°C

Humidity 96%
Wind Speed S 6 mph
Barometer 29.72 in (1006.3 mb)
Dewpoint 63°F (17°C)
Visibility 4.00 mi
Last update 18 Oct 6:53 pm CDT
Extended Forecast for

Caseyville IL

  • Tonight

    Tonight: Showers and possibly a thunderstorm before midnight, then showers likely. Some of the storms could produce heavy rainfall. Low around 52. South wind 8 to 18 mph becoming northwest in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    Low: 52 °F

    Heavy Rain
    then Showers
    Likely

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 65. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 32 mph.

    High: 65 °F

    Becoming
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 43. West wind 5 to 9 mph becoming light and variable.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 71. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 71 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. South wind 10 to 16 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. Breezy.

    High: 66 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before midnight, then showers likely. Some of the storms could produce heavy rainfall. Low around 52. South wind 8 to 18 mph becoming northwest in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 65. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 32 mph.
Sunday Night
Clear, with a low around 43. West wind 5 to 9 mph becoming light and variable.
Monday
Sunny, with a high near 71. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.
Monday Night
Mostly clear, with a low around 51. South wind 10 to 16 mph becoming west after midnight. Winds could gust as high as 23 mph.
Tuesday
Sunny, with a high near 66. Breezy.
Tuesday Night
Clear, with a low around 43.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Sunny, with a high near 69.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 63.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday
A 20 percent chance of showers. Partly sunny, with a high near 65.
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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:
5:56 pm CDT Oct 18, 2025
Forecast Valid:
7pm CDT Oct 18, 2025-6pm CDT Oct 25, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation