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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

81°F

27°C

Humidity 58%
Wind Speed SW 12 G 25 mph
Barometer 29.82 in (1009.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 10 Mar 12:53 pm CDT
Extended Forecast for

Cahokia IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 83. South wind around 15 mph, with gusts as high as 26 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly after 5am. Mostly cloudy, with a low around 55. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    Low: 55 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 3pm, then a slight chance of rain between 3pm and 4pm. Temperature rising to near 65 by noon, then falling to around 51 during the remainder of the day. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 65 °F⇓

    T-storms then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Northwest wind 6 to 16 mph, with gusts as high as 28 mph.

    Low: 33 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 57. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 57 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 83. South wind around 15 mph, with gusts as high as 26 mph.
Tonight
Showers and thunderstorms likely, mainly after 5am. Mostly cloudy, with a low around 55. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday
Rain and possibly a thunderstorm before 3pm, then a slight chance of rain between 3pm and 4pm. Temperature rising to near 65 by noon, then falling to around 51 during the remainder of the day. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Northwest wind 6 to 16 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 57. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Partly sunny, with a high near 65.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 52.
Sunday
Rain likely. Mostly cloudy, with a high near 63. Breezy. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 38.
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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:
10:51 am CDT Mar 10, 2026
Forecast Valid:
1pm CDT Mar 10, 2026-6pm CDT Mar 16, 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