National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

56°F

13°C

Humidity 65%
Wind Speed N 7 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 15 Feb 2:53 pm CST
Extended Forecast for

2 Miles SE Cahokia IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 65. Light southwest wind becoming south 5 to 10 mph in the morning.

    High: 65 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. South wind 6 to 8 mph.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. South wind around 18 mph, with gusts as high as 31 mph.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 74. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 38. Calm wind.
Washington's Birthday
Partly sunny, with a high near 65. Light southwest wind becoming south 5 to 10 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 58. South wind around 18 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 74. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40.
Friday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 54.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 32.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 49.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Cahokia IL
 38.53°N 90.15°W (Elev. 499 ft)
Last Update:
2:46 pm CST Feb 15, 2026
Forecast Valid:
3pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation