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 and Windy

24°F

-4°C

Humidity 60%
Wind Speed NW 26 G 37 mph
Barometer 29.99 in (1016.1 mb)
Dewpoint 12°F (-11°C)
Visibility 9.00 mi
Wind Chill8°F (-13°C)
Last update 16 Mar 11:53 am CDT
Extended Forecast for

Cahokia IL

  • This Afternoon

    This Afternoon: A chance of flurries before 1pm. Mostly cloudy, with a high near 30. Blustery, with a northwest wind around 22 mph, with gusts as high as 32 mph.

    High: 30 °F

    Chance
    Flurries and
    Blustery

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 16. Northwest wind 10 to 17 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. Northwest wind 5 to 7 mph becoming south in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 32. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 32 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 65. South wind 7 to 10 mph becoming west in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of flurries before 1pm. Mostly cloudy, with a high near 30. Blustery, with a northwest wind around 22 mph, with gusts as high as 32 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 16. Northwest wind 10 to 17 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 38. Northwest wind 5 to 7 mph becoming south in the afternoon.
Tuesday Night
A chance of snow before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 32. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 65. South wind 7 to 10 mph becoming west in the afternoon.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Sunny, with a high near 72.
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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:
8:41 am CDT Mar 16, 2026
Forecast Valid:
12pm CDT Mar 16, 2026-6pm CDT Mar 22, 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