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

55°F

13°C

Humidity 53%
Wind Speed S 3 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 13 Nov 8:53 pm CST
Extended Forecast for

Cahokia IL

  • Tonight

    Tonight: Partly cloudy, with a low around 48. South wind 3 to 5 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 5 to 9 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. South wind around 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 79. Southwest wind 7 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 79 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45. North wind 5 to 8 mph.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.

    Low: 47 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 48. South wind 3 to 5 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 5 to 9 mph.
Friday Night
Partly cloudy, with a low around 60. South wind around 7 mph.
Saturday
Partly sunny, with a high near 79. Southwest wind 7 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Mostly clear, with a low around 45. North wind 5 to 8 mph.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 39.
Monday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 59.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 63.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 46.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 60.
Wednesday Night
Rain likely. Cloudy, with a low around 49. Chance of precipitation is 60%.
Thursday
Rain likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
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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:
8:16 pm CST Nov 13, 2025
Forecast Valid:
9pm CST Nov 13, 2025-6pm CST Nov 20, 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