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

49°F

9°C

Humidity 94%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 8 Oct 5:35 am CDT
Extended Forecast for

Bethalto IL

  • Today

    Today: Sunny, with a high near 86. Calm wind becoming northeast around 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. South wind 5 to 10 mph.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 60. South wind 5 to 8 mph.

    Low: 60 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. South wind 6 to 11 mph.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 90.

    High: 90 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 56. Light and variable wind becoming southeast around 5 mph after midnight.
Friday
Sunny, with a high near 90. South wind 5 to 10 mph.
Friday Night
Clear, with a low around 60. South wind 5 to 8 mph.
Saturday
Mostly sunny, with a high near 86. South wind 6 to 11 mph.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Sunday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 58.
Columbus Day
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 61.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 76.
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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:
5:31 am CDT Oct 8, 2026
Forecast Valid:
5am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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