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

27°F

-3°C

Humidity 46%
Wind Speed NW 8 mph
Barometer 30.33 in (1027.3 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 22 Jan 2:53 am CST
Extended Forecast for

Cahokia IL

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm
Cold Weather Advisory January 24, 12:00am until January 24, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 25. Northwest wind around 6 mph.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 39. Northwest wind 3 to 5 mph.

    High: 39 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 12. Light and variable wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 23 mph.

    Low: 12 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 17. North wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 17 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow after midnight. Cloudy, with a low around 4. North wind 8 to 10 mph.

    Low: 4 °F

    Cloudy then
    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 15. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 15 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 9. Chance of precipitation is 80%.

    Low: 9 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 19.

    High: 19 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 25. Northwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 39. Northwest wind 3 to 5 mph.
Thursday Night
Partly cloudy, with a low around 12. Light and variable wind becoming north 9 to 14 mph after midnight. Winds could gust as high as 23 mph.
Friday
Mostly cloudy and cold, with a high near 17. North wind 10 to 15 mph, with gusts as high as 23 mph.
Friday Night
A 30 percent chance of snow after midnight. Cloudy, with a low around 4. North wind 8 to 10 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 15. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 9. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 19.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny and cold, with a high near 17.
Monday Night
Mostly clear, with a low around 3.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 13.
Wednesday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
2:31 am CST Jan 22, 2026
Forecast Valid:
3am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
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