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

42°F

6°C

Humidity 58%
Wind Speed W 13 G 20 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 26 Nov 12:53 am CST
Extended Forecast for

Cahokia IL

  • Overnight

    Overnight: Mostly clear, with a low around 34. West wind 14 to 17 mph, with gusts as high as 34 mph.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46. Breezy, with a west wind 14 to 21 mph, with gusts as high as 33 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 28. West wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 43. Northwest wind 7 to 10 mph.

    High: 43 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24. Northwest wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain and snow likely after midnight. Cloudy, with a low around 30. Chance of precipitation is 60%.

    Low: 30 °F

    Cloudy then
    Rain/Snow
    Likely

  • Saturday

    Saturday: Rain and snow. High near 40. Chance of precipitation is 80%.

    High: 40 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Cloudy, with a low around 28. Chance of precipitation is 70%.

    Low: 28 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 34. West wind 14 to 17 mph, with gusts as high as 34 mph.
Wednesday
Mostly sunny, with a high near 46. Breezy, with a west wind 14 to 21 mph, with gusts as high as 33 mph.
Wednesday Night
Increasing clouds, with a low around 28. West wind 8 to 13 mph, with gusts as high as 20 mph.
Thanksgiving Day
Sunny, with a high near 43. Northwest wind 7 to 10 mph.
Thursday Night
Mostly clear, with a low around 24. Northwest wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 40.
Friday Night
Rain and snow likely after midnight. Cloudy, with a low around 30. Chance of precipitation is 60%.
Saturday
Rain and snow. High near 40. Chance of precipitation is 80%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 28. Chance of precipitation is 70%.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 35.
Sunday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 21. Chance of precipitation is 20%.
Monday
A slight chance of rain and snow. Mostly cloudy, with a high near 32. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.55°N 90.15°W (Elev. 407 ft)
Last Update:
12:26 am CST Nov 26, 2025
Forecast Valid:
1am CST Nov 26, 2025-6pm CST Dec 2, 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