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

34°F

1°C

Humidity 73%
Wind Speed Calm
Barometer 29.69 in (1005.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 25 Feb 3:53 am CST
Extended Forecast for

2 Miles SE Cahokia IL

  • Today

    Today: Mostly cloudy, with a high near 52. Calm wind becoming north around 5 mph.

    High: 52 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 50 percent chance of rain, mainly between 9pm and 5am. Mostly cloudy, with a low around 35. Northeast wind 3 to 6 mph.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 54. East wind around 6 mph becoming light and variable in the afternoon.

    High: 54 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35. Calm wind becoming south around 5 mph after midnight.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69. Southwest wind 5 to 10 mph.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain. Partly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.

    High: 47 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 52. Calm wind becoming north around 5 mph.
Tonight
A 50 percent chance of rain, mainly between 9pm and 5am. Mostly cloudy, with a low around 35. Northeast wind 3 to 6 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 54. East wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
Mostly clear, with a low around 35. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 69. Southwest wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 43.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 33.
Sunday
A chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Sunday Night
Rain likely before midnight, then a chance of rain and snow. Some thunder is also possible. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 31.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
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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:
1:51 am CST Feb 25, 2026
Forecast Valid:
5am CST Feb 25, 2026-6pm CST Mar 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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