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.

Fog/Mist

54°F

12°C

Humidity 88%
Wind Speed E 5 mph
Barometer 30.04 in
Dewpoint 50°F (10°C)
Visibility 5.00 mi
Wind Chill53°F (12°C)
Last update 20 Nov 2:50 pm CST
Extended Forecast for

Glen Carbon IL

  • Tonight

    Tonight: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 52. East wind 3 to 5 mph. Chance of precipitation is 100%.

    Low: 52 °F

    Chance Rain
    then Rain and
    Patchy Fog

  • Friday

    Friday: Rain. Patchy fog before 10am. High near 56. East wind 6 to 8 mph. Chance of precipitation is 100%.

    High: 56 °F

    Rain and
    Patchy Fog
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain, mainly before midnight. Low around 44. Northeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 57. North wind 3 to 6 mph.

    High: 57 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Monday

    Monday: Rain likely, mainly after noon. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Rain Likely

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 49. Chance of precipitation is 80%.

    Low: 49 °F

    Rain then
    Chance Rain

Detailed Forecast

Tonight
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 52. East wind 3 to 5 mph. Chance of precipitation is 100%.
Friday
Rain. Patchy fog before 10am. High near 56. East wind 6 to 8 mph. Chance of precipitation is 100%.
Friday Night
Rain, mainly before midnight. Low around 44. Northeast wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
Sunny, with a high near 57. North wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 38. Calm wind.
Sunday
Sunny, with a high near 61.
Sunday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 43.
Monday
Rain likely, mainly after noon. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Monday Night
Rain, mainly before midnight. Low around 49. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 47.
Wednesday Night
Partly cloudy, with a low around 30.
Thanksgiving Day
Mostly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Glen Carbon IL
 38.77°N 90°W (Elev. 551 ft)
Last Update:
3:16 pm CST Nov 20, 2025
Forecast Valid:
3pm CST Nov 20, 2025-6pm CST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

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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