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.

Overcast

32°F

0°C

Humidity 37%
Wind Speed S 14 mph
Barometer 29.83 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 15 Jan 9:45 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Snow likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 26. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 26 °F

    Snow Likely
    then Mostly
    Cloudy

  • Friday

    Friday: A slight chance of rain between 3pm and 5pm, then a slight chance of snow after 5pm. Mostly cloudy, with a high near 44. West wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 44 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Chance Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Partly sunny, with a high near 26. West wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 26 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 11. Northwest wind 6 to 11 mph.

    Low: 11 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 21.

    High: 21 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

Detailed Forecast

Tonight
Snow likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 26. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Friday
A slight chance of rain between 3pm and 5pm, then a slight chance of snow after 5pm. Mostly cloudy, with a high near 44. West wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Friday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 22 mph.
Saturday
Partly sunny, with a high near 26. West wind 13 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 11. Northwest wind 6 to 11 mph.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 12.
M.L.King Day
Sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 9.
Tuesday
Sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 40.
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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:
9:41 pm CST Jan 15, 2026
Forecast Valid:
10pm CST Jan 15, 2026-6pm CST Jan 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation