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

41°F

5°C

Humidity 70%
Wind Speed N 13 mph
Barometer 30.08 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 6 Feb 3:50 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Partly cloudy, with a low around 22. North wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 35. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 35 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. South wind 7 to 10 mph.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 49. South wind 6 to 10 mph.

    High: 49 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. East wind around 6 mph becoming calm after midnight.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 64.

    High: 64 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 22. North wind 6 to 10 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 35. Northeast wind around 6 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 25. South wind 7 to 10 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 49. South wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 29. East wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 39.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 64.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 38.
Wednesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 49.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30.
Thursday
A 20 percent chance of rain. Mostly cloudy, with a high near 45.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 45.
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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:
3:16 pm CST Feb 6, 2026
Forecast Valid:
4pm CST Feb 6, 2026-6pm CST Feb 13, 2026
 
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