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

29°F

-2°C

Humidity 38%
Wind Speed SW 5 mph
Barometer 30.00 in (1016.6 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 18 Jan 4:53 pm CST
Extended Forecast for

Cahokia IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 12. Southwest wind 6 to 11 mph becoming northwest 12 to 17 mph after midnight. Winds could gust as high as 31 mph.

    Low: 12 °F

    Decreasing
    Clouds

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 22. Northwest wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 22 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 13. Light and variable wind becoming west around 6 mph after midnight.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. South wind 3 to 7 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 12. Southwest wind 6 to 11 mph becoming northwest 12 to 17 mph after midnight. Winds could gust as high as 31 mph.
M.L.King Day
Sunny, with a high near 22. Northwest wind 7 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 13. Light and variable wind becoming west around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 38. South wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 29. South wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 47.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly cloudy, with a high near 40.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 16. Chance of precipitation is 30%.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 26.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 7.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 21.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
5:01 pm CST Jan 18, 2026
Forecast Valid:
5pm CST Jan 18, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation