National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

59°F

15°C

Humidity 96%
Wind Speed NA
Barometer 30.16 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 4 Oct 4:55 am CDT
Extended Forecast for

2 Miles WNW Glen Carbon IL

  • Today

    Today: Sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 59. Southeast wind around 7 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. South wind 5 to 8 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 8 mph. Chance of precipitation is 40%.

    High: 86 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.
Tonight
Clear, with a low around 59. Southeast wind around 7 mph.
Sunday
Sunny, with a high near 86. South wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 64. South wind 5 to 8 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 8 mph. Chance of precipitation is 40%.
Monday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 40%.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 50.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Glen Carbon IL
 38.77°N 90°W (Elev. 551 ft)
Last Update:
4:16 am CDT Oct 4, 2025
Forecast Valid:
5am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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