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

28°F

-2°C

Humidity 34%
Wind Speed SW 9 mph
Barometer 30.00 in
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 15 Jan 1:45 pm CST
Extended Forecast for

Bethalto IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 32. South wind around 8 mph.

    High: 32 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely, mainly before midnight. Mostly cloudy, with a temperature rising to around 33 by 4am. South wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 26 °F⇑

    Snow Likely
    then Slight
    Chance Snow

  • Friday

    Friday: A slight chance of rain showers between 3pm and 5pm, then a slight chance of snow showers 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

    Partly Sunny
    then Isolated
    Rain/Snow

  • Friday Night

    Friday Night: Scattered snow showers, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    Low: 21 °F

    Scattered
    Snow Showers
    then Isolated
    Snow Showers

  • Saturday

    Saturday: Partly sunny, with a high near 24. West wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 24 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 24.

    High: 24 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 32. South wind around 8 mph.
Tonight
Snow likely, mainly before midnight. Mostly cloudy, with a temperature rising to around 33 by 4am. South wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
A slight chance of rain showers between 3pm and 5pm, then a slight chance of snow showers 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
Scattered snow showers, mainly before midnight. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 24. West wind 13 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 9.
Tuesday
Sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Mostly sunny, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
11:21 am CST Jan 15, 2026
Forecast Valid:
2pm CST Jan 15, 2026-6pm CST Jan 21, 2026
 
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