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.

Partly Cloudy

88°F

31°C

Humidity 46%
Wind Speed S 15 G 25 mph
Barometer 29.81 in (1009.2 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 14 Apr 3:53 pm CDT
Extended Forecast for

Cahokia IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 70. South wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 82. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 64. Southwest wind 7 to 10 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. Southwest wind 6 to 10 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Southwest wind around 6 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 70. South wind 9 to 14 mph, with gusts as high as 25 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 82. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 64. Southwest wind 7 to 10 mph. Chance of precipitation is 80%.
Thursday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. Southwest wind 6 to 10 mph. Chance of precipitation is 70%.
Thursday Night
Mostly clear, with a low around 61. Southwest wind around 6 mph becoming calm in the evening.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 43.
Sunday
Sunny, with a high near 63.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 74.
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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:
1:26 pm CDT Apr 14, 2026
Forecast Valid:
4pm CDT Apr 14, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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