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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

A Few Clouds

66°F

19°C

Humidity 94%
Wind Speed Vrbl 3 mph
Barometer 30.23 in
Dewpoint 64°F (18°C)
Visibility 7.00 mi
Last update 6 Aug 6:50 am CDT
Extended Forecast for

Glen Carbon ILSimilar City Names

  • Today

    Today: Mostly sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. Southeast wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South wind 3 to 8 mph.

    High: 90 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Southeast wind 3 to 6 mph.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 92. South wind 5 to 9 mph.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 69. Southeast wind around 5 mph becoming calm in the evening.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 71. Southeast wind 3 to 6 mph.
Friday
Sunny, with a high near 92. South wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Glen Carbon ILSimilar City Names
 38.77°N 89.97°W (Elev. 548 ft)
Last Update:
4:36 am CDT Aug 6, 2025
Forecast Valid:
6am CDT Aug 6, 2025-6pm CDT Aug 12, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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