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

41°F

5°C

Humidity 49%
Wind Speed W 10 mph
Barometer 30.30 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 26 Nov 8:50 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Northwest wind 8 to 10 mph.

    Low: 27 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 40. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 40 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 21. Northwest wind 3 to 7 mph.

    Low: 21 °F

    Clear

  • Friday

    Friday: Increasing clouds, with a high near 38. Light and variable wind.

    High: 38 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 50 percent chance of snow after midnight. Cloudy, with a low around 29. Light southeast wind increasing to 6 to 11 mph in the evening.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow before noon, then rain, possibly mixed with snow. High near 38. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 38 °F

    Snow then
    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, possibly mixed with snow, mainly before midnight. Cloudy, with a low around 25. Chance of precipitation is 60%.

    Low: 25 °F

    Rain/Snow
    Likely then
    Slight Chance
    Rain/Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 27. Northwest wind 8 to 10 mph.
Thanksgiving Day
Sunny, with a high near 40. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 21. Northwest wind 3 to 7 mph.
Friday
Increasing clouds, with a high near 38. Light and variable wind.
Friday Night
A 50 percent chance of snow after midnight. Cloudy, with a low around 29. Light southeast wind increasing to 6 to 11 mph in the evening.
Saturday
Snow before noon, then rain, possibly mixed with snow. High near 38. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
Rain likely, possibly mixed with snow, mainly before midnight. Cloudy, with a low around 25. Chance of precipitation is 60%.
Sunday
Mostly cloudy, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 27.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
5:11 pm CST Nov 26, 2025
Forecast Valid:
9pm CST Nov 26, 2025-6pm CST Dec 3, 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