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

54°F

12°C

Humidity 72%
Wind Speed Vrbl 5 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 45°F (7°C)
Visibility 8.00 mi
Wind Chill53°F (12°C)
Last update 22 Nov 11:53 am CST
Extended Forecast for

Cahokia IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 56. Northwest wind around 5 mph becoming light and variable.

    High: 56 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Light west wind.

    Low: 43 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 60. Light and variable wind.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 43. Light southeast wind.

    Low: 43 °F

    Increasing
    Clouds

  • Monday

    Monday: Showers likely after noon. Cloudy, with a high near 58. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 58 °F

    Cloudy then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers, mainly before midnight. Low around 51. Chance of precipitation is 90%.

    Low: 51 °F

    Showers then
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 56. Northwest wind around 5 mph becoming light and variable.
Tonight
Partly cloudy, with a low around 43. Light west wind.
Sunday
Mostly sunny, with a high near 60. Light and variable wind.
Sunday Night
Increasing clouds, with a low around 43. Light southeast wind.
Monday
Showers likely after noon. Cloudy, with a high near 58. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Monday Night
Showers, mainly before midnight. Low around 51. Chance of precipitation is 90%.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 30.
Thanksgiving Day
Mostly sunny, with a high near 47.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
10:26 am CST Nov 22, 2025
Forecast Valid:
12pm CST Nov 22, 2025-6pm CST Nov 28, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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