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

25°F

-4°C

Humidity 69%
Wind Speed NE 6 mph
Barometer 30.42 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 4 Feb 6:45 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Mostly clear, with a low around 14. North wind around 5 mph becoming calm in the evening.

    Low: 14 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly cloudy, with a high near 38. Light south wind increasing to 5 to 10 mph in the morning.

    High: 38 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. South wind 5 to 9 mph becoming west in the evening.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48. Breezy, with a west wind 10 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 48 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24. North wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 24 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 14. North wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 38. Light south wind increasing to 5 to 10 mph in the morning.
Thursday Night
Partly cloudy, with a low around 27. South wind 5 to 9 mph becoming west in the evening.
Friday
Mostly sunny, with a high near 48. Breezy, with a west wind 10 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.
Friday Night
Partly cloudy, with a low around 24. North wind 6 to 13 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 30.
Monday
Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 38.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 60.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A 20 percent chance of rain. Sunny, with a high near 55.
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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:
2:37 pm CST Feb 4, 2026
Forecast Valid:
7pm CST Feb 4, 2026-6pm CST Feb 11, 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