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

72°F

22°C

Humidity 66%
Wind Speed S 17 G 28 mph
Barometer 29.78 in (1008.3 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 9 Mar 1:53 pm CDT
Extended Forecast for

2 Miles SE Cahokia IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. South wind around 17 mph, with gusts as high as 25 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. South wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 56. Southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then showers likely. Temperature rising to near 65 by 10am, then falling to around 50 during the remainder of the day. Southwest wind 14 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    High: 65 °F⇓

    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. South wind around 17 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 61. South wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 81. South wind 6 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 56. Southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before 1pm, then showers likely. Temperature rising to near 65 by 10am, then falling to around 50 during the remainder of the day. Southwest wind 14 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Mostly cloudy, with a high near 65.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 70.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 66.
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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:
1:26 pm CDT Mar 9, 2026
Forecast Valid:
2pm CDT Mar 9, 2026-6pm CDT Mar 15, 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