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

10°F

-12°C

Humidity 69%
Wind Speed N 6 mph
Barometer 30.34 in (1028.1 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 30 Jan 3:53 am CST
Extended Forecast for

Cahokia IL

  • Today

    Today: A chance of flurries after 1pm. Mostly sunny and cold, with a high near 19. North wind 5 to 11 mph.

    High: 19 °F

    Chance
    Flurries

  • Tonight

    Tonight: A chance of flurries before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 5. North wind 10 to 13 mph.

    Low: 5 °F

    Chance
    Flurries

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm in the evening.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 31. Calm wind becoming south around 6 mph in the afternoon.

    High: 31 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
A chance of flurries after 1pm. Mostly sunny and cold, with a high near 19. North wind 5 to 11 mph.
Tonight
A chance of flurries before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 5. North wind 10 to 13 mph.
Saturday
Mostly sunny and cold, with a high near 19. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 31. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 37.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 39.
Tuesday Night
A chance of rain before midnight, then a slight chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Wednesday
Cloudy, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 36.
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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:
5:11 am CST Jan 30, 2026
Forecast Valid:
5am CST Jan 30, 2026-6pm CST Feb 5, 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