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.

Fair

61°F

16°C

Humidity 31%
Wind Speed W 16 mph
Barometer 29.79 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 13 Jan 12:50 pm CST
Extended Forecast for

Glen Carbon IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 62. West wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 62 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. West wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of sprinkles and flurries between 7am and 9am. Mostly cloudy through mid morning, then gradual clearing, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 14 to 21 mph, with gusts as high as 30 mph.

    High: 38 °F⇓

    Breezy.
    Chance
    Sprinkles/Flurries
    then Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 18. Northwest wind 8 to 14 mph, with gusts as high as 24 mph.

    Low: 18 °F

    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32. Northwest wind around 7 mph becoming south in the afternoon.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 32 by 2am.

    Low: 27 °F⇑

    Slight Chance
    Snow

  • Friday

    Friday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 62. West wind 9 to 15 mph, with gusts as high as 26 mph.
Tonight
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. West wind 8 to 13 mph, with gusts as high as 23 mph.
Wednesday
A chance of sprinkles and flurries between 7am and 9am. Mostly cloudy through mid morning, then gradual clearing, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 14 to 21 mph, with gusts as high as 30 mph.
Wednesday Night
Clear, with a low around 18. Northwest wind 8 to 14 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 32. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 32 by 2am.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly cloudy, with a high near 30.
Saturday Night
Mostly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Mostly clear, with a low around 13.
M.L.King Day
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Glen Carbon IL
 38.77°N 90°W (Elev. 551 ft)
Last Update:
1:01 pm CST Jan 13, 2026
Forecast Valid:
1pm CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation