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.

Light Snow

20°F

-7°C

Humidity 81%
Wind Speed NW 12 mph
Barometer 30.17 in (1022.2 mb)
Dewpoint 15°F (-9°C)
Visibility 0.75 mi
Wind Chill8°F (-13°C)
Last update 17 Jan 10:53 am CST
Extended Forecast for

Cahokia IL

  • Today

    Today: A chance of snow showers, mainly before noon, then a chance of flurries after 1pm. Mostly cloudy, with a high near 27. West wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 27 °F

    Chance Snow
    Showers

  • Tonight

    Tonight: A chance of flurries before 9pm. Mostly cloudy, with a low around 13. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Chance
    Flurries

  • Sunday

    Sunday: A chance of flurries after 10am. Partly sunny, with a high near 36. Southwest wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 36 °F

    Chance
    Flurries

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Partly cloudy, with a low around 13. West wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 26 mph.

    Low: 13 °F

    Chance
    Flurries

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 24. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 24 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

Detailed Forecast

Today
A chance of snow showers, mainly before noon, then a chance of flurries after 1pm. Mostly cloudy, with a high near 27. West wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Tonight
A chance of flurries before 9pm. Mostly cloudy, with a low around 13. West wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
A chance of flurries after 10am. Partly sunny, with a high near 36. Southwest wind 5 to 11 mph, with gusts as high as 21 mph.
Sunday Night
A chance of flurries before 9pm. Partly cloudy, with a low around 13. West wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 26 mph.
M.L.King Day
Sunny, with a high near 24. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 40.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A slight chance of rain before midnight, then a slight chance of snow. Partly cloudy, with a low around 21. Chance of precipitation is 20%.
Thursday
A 20 percent chance of snow. Mostly sunny, with a high near 35.
Thursday Night
A 20 percent chance of snow. Partly cloudy, with a low around 20.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 38.
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:
10:56 am CST Jan 17, 2026
Forecast Valid:
11am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
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