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.

Fair

82°F

28°C

Humidity 69%
Wind Speed Vrbl 6 mph
Barometer 30.08 in (1018.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 10 Aug 8:53 am CDT
Extended Forecast for

Cahokia IL

  • Today

    Today: A 20 percent chance of showers after 11am. Mostly sunny, with a high near 92. South wind 7 to 11 mph.

    High: 92 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 3am, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 74. South wind 3 to 8 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 9am. Sunny, with a high near 92. South wind 5 to 8 mph.

    High: 92 °F

    Slight Chance
    T-storms then
    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74. Southeast wind 5 to 7 mph becoming calm in the evening.

    Low: 74 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 94 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 92.

    High: 92 °F

    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers after 11am. Mostly sunny, with a high near 92. South wind 7 to 11 mph.
Tonight
A slight chance of showers and thunderstorms before 3am, then a slight chance of showers and thunderstorms after 5am. Mostly clear, with a low around 74. South wind 3 to 8 mph. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms before 9am. Sunny, with a high near 92. South wind 5 to 8 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74. Southeast wind 5 to 7 mph becoming calm in the evening.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 73.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 74.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 75.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96.
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:
8:36 am CDT Aug 10, 2025
Forecast Valid:
9am CDT Aug 10, 2025-6pm CDT Aug 16, 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