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.

Fog/Mist

37°F

3°C

Humidity 89%
Wind Speed S 8 mph
Barometer 29.94 in
Dewpoint 34°F (1°C)
Visibility 5.00 mi
Wind Chill31°F (-1°C)
Last update 7 Dec 2:35 am CST
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: A chance of sprinkles and flurries after 5am. Mostly cloudy, with a low around 34. South wind around 6 mph.

    Low: 34 °F

    Chance
    Sprinkles/Flurries

  • Sunday

    Sunday: A chance of sprinkles and flurries before 9am, then a chance of sprinkles between 9am and 11am. Cloudy, with a high near 38. Light and variable wind becoming north 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 38 °F

    Chance
    Sprinkles/Flurries
    then Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. North wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24. Light south wind increasing to 5 to 10 mph in the evening.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Overnight
A chance of sprinkles and flurries after 5am. Mostly cloudy, with a low around 34. South wind around 6 mph.
Sunday
A chance of sprinkles and flurries before 9am, then a chance of sprinkles between 9am and 11am. Cloudy, with a high near 38. Light and variable wind becoming north 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 21. North wind 6 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 24. Light south wind increasing to 5 to 10 mph in the evening.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 46.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 26.
Thursday
A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 24.
Friday Night
Mostly cloudy, with a low around 4.
Saturday
Partly sunny and cold, with a high near 20.
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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:
2:41 am CST Dec 7, 2025
Forecast Valid:
2am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation