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.

Overcast

34°F

1°C

Humidity 67%
Wind Speed W 14 G 25 mph
Barometer 30.11 in (1019.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 29 Nov 11:53 pm CST
Extended Forecast for

Cahokia IL

  • Overnight

    Overnight: Cloudy, with a low around 23. West wind around 17 mph, with gusts as high as 29 mph.

    Low: 23 °F

    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 29. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 29 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow after noon. Cloudy, with a high near 32. Light east wind.

    High: 32 °F

    Cloudy then
    Chance Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Cloudy, with a low around 23. Calm wind. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 23 °F

    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 23. West wind around 17 mph, with gusts as high as 29 mph.
Sunday
Mostly cloudy, with a high near 29. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly cloudy, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
A 40 percent chance of snow after noon. Cloudy, with a high near 32. Light east wind.
Monday Night
Snow likely, mainly before midnight. Cloudy, with a low around 23. Calm wind. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Tuesday
Partly sunny, with a high near 32.
Tuesday Night
Mostly clear, with a low around 20.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 29.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 21.
Friday
A slight chance of rain and snow. Partly sunny, with a high near 39. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
11:21 pm CST Nov 29, 2025
Forecast Valid:
12am CST Nov 30, 2025-6pm CST Dec 6, 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