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

62°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 22 Aug 4:35 am CDT
Extended Forecast for

Bethalto IL

  • Today

    Today: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 85. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. Light northeast wind.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 86. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 86 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 58. North wind around 6 mph.

    Low: 58 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 79. Northwest wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 85. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 64. Light northeast wind.
Saturday
Increasing clouds, with a high near 86. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 58. North wind around 6 mph.
Sunday
Sunny, with a high near 79. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 57.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 79.
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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:
4:16 am CDT Aug 22, 2025
Forecast Valid:
4am CDT Aug 22, 2025-6pm CDT Aug 28, 2025
 
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