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.

Mostly Cloudy

15°F

-9°C

Humidity 67%
Wind Speed N 8 mph
Barometer 30.37 in (1028.9 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 29 Jan 11:53 pm CST
Extended Forecast for

Cahokia IL

  • Overnight

    Overnight: A chance of flurries before 1am. Mostly cloudy, with a low around 4. North wind 3 to 5 mph.

    Low: 4 °F

    Chance
    Flurries

  • Friday

    Friday: A chance of flurries after 1pm. Partly sunny and cold, with a high near 19. Light north wind increasing to 5 to 9 mph in the morning.

    High: 19 °F

    Chance
    Flurries

  • Friday Night

    Friday Night: A chance of flurries before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 6. North wind around 9 mph, with gusts as high as 20 mph.

    Low: 6 °F

    Chance
    Flurries

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 19 °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: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of flurries before 1am. Mostly cloudy, with a low around 4. North wind 3 to 5 mph.
Friday
A chance of flurries after 1pm. Partly sunny and cold, with a high near 19. Light north wind increasing to 5 to 9 mph in the morning.
Friday Night
A chance of flurries before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 6. North wind around 9 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny and cold, with a high near 19. Northwest wind 7 to 11 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
Mostly sunny, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 36. Chance of precipitation is 20%.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Partly sunny, with a high near 35.
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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:
10:01 pm CST Jan 29, 2026
Forecast Valid:
12am CST Jan 30, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation