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.

Partly Cloudy

13°F

-11°C

Humidity 77%
Wind Speed N 13 mph
Barometer 30.52 in (1034.3 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 31 Jan 1:53 am CST
Extended Forecast for

Cahokia IL

  • Overnight

    Overnight: A chance of flurries before 3am. Partly cloudy, with a low around 5. Northwest wind around 10 mph.

    Low: 5 °F

    Chance
    Flurries

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 20. Northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 20 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 2. Northwest wind around 6 mph becoming calm in the evening.

    Low: 2 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 31. South wind 3 to 8 mph.

    High: 31 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20. South wind around 5 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow, mainly after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.

    High: 39 °F

    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 24. Chance of precipitation is 20%.

    Low: 24 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Overnight
A chance of flurries before 3am. Partly cloudy, with a low around 5. Northwest wind around 10 mph.
Saturday
Mostly sunny and cold, with a high near 20. Northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 2. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 31. South wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 20. South wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 39.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
A chance of rain and snow, mainly after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
Tuesday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 24. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 32.
Wednesday Night
Mostly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 43.
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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:
9:26 pm CST Jan 30, 2026
Forecast Valid:
2am CST Jan 31, 2026-6pm CST Feb 6, 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