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.

Overcast

35°F

2°C

Humidity 82%
Wind Speed N 14 G 22 mph
Barometer 30.17 in (1021.8 mb)
Dewpoint 30°F (-1°C)
Visibility 8.00 mi
Wind Chill26°F (-3°C)
Last update 7 Dec 3:53 pm CST
Extended Forecast for

Caseyville IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle after 5pm. Cloudy, with a steady temperature around 34. North wind around 14 mph.

    High: 34 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: A slight chance of snow between 7pm and 9pm. Mostly cloudy, with a low around 22. North wind 6 to 11 mph. Chance of precipitation is 20%.

    Low: 22 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 35. North wind around 5 mph becoming calm in the morning.

    High: 35 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Calm wind becoming south 5 to 9 mph in the evening.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 36.

    High: 36 °F

    Chance Snow

Detailed Forecast

This Afternoon
A slight chance of drizzle after 5pm. Cloudy, with a steady temperature around 34. North wind around 14 mph.
Tonight
A slight chance of snow between 7pm and 9pm. Mostly cloudy, with a low around 22. North wind 6 to 11 mph. Chance of precipitation is 20%.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 35. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 26. Calm wind becoming south 5 to 9 mph in the evening.
Tuesday
Mostly sunny, with a high near 52. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.
Thursday
A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 7.
Saturday
Partly sunny, with a high near 21.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Caseyville IL
 38.66°N 90.06°W (Elev. 433 ft)
Last Update:
3:16 pm CST Dec 7, 2025
Forecast Valid:
4pm CST Dec 7, 2025-6pm CST Dec 14, 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