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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Cahokia IL

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then showers and possibly a thunderstorm, mainly after 3am. Patchy fog after 9pm. Low around 55. Light and variable wind. Chance of precipitation is 80%.

    Low: 55 °F

    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 9am, then isolated showers between 9am and 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming west 5 to 8 mph. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely and
    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Friday

    Friday: Isolated showers. Partly sunny, with a high near 80. South wind 8 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 80 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 58 °F

    Scattered
    T-storms then
    Showers

  • Saturday

    Saturday: Scattered showers before noon. Mostly cloudy, with a high near 68. Chance of precipitation is 50%.

    High: 68 °F

    Scattered
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms before 3am, then showers and possibly a thunderstorm, mainly after 3am. Patchy fog after 9pm. Low around 55. Light and variable wind. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm before 9am, then isolated showers between 9am and 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming west 5 to 8 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 60%.
Friday
Isolated showers. Partly sunny, with a high near 80. South wind 8 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday Night
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday
Scattered showers before noon. Mostly cloudy, with a high near 68. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 78.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.
Wednesday
Showers likely. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Cahokia IL
 38.57°N 90.18°W (Elev. 407 ft)
Last Update:
8:47 pm CST Mar 4, 2026
Forecast Valid:
8pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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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