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.

Fair

36°F

2°C

Humidity 73%
Wind Speed N 12 mph
Barometer 30.23 in (1023.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 6 Feb 11:53 pm CST
Extended Forecast for

Cahokia IL

  • Tonight

    Tonight: Clear, with a low around 25. North wind 3 to 6 mph.

    Low: 25 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 37. Light and variable wind becoming southeast around 6 mph in the morning.

    High: 37 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27. South wind 5 to 7 mph.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48. Southeast wind 6 to 8 mph.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. Southeast wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.

    Low: 41 °F

    Rain Likely

Detailed Forecast

Tonight
Clear, with a low around 25. North wind 3 to 6 mph.
Saturday
Sunny, with a high near 37. Light and variable wind becoming southeast around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 27. South wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 48. Southeast wind 6 to 8 mph.
Sunday Night
Mostly clear, with a low around 31. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 67.
Tuesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 52.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 32.
Thursday
A 20 percent chance of rain. Mostly cloudy, with a high near 48.
Thursday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 32.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 47.
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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:
11:01 pm CST Feb 6, 2026
Forecast Valid:
11pm CST Feb 6, 2026-6pm CST Feb 13, 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