National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

44°F

7°C

Humidity 63%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 25 Mar 5:35 am CDT
Extended Forecast for

Bethalto IL

  • Today

    Today: Mostly sunny, with a high near 77. Southeast wind 5 to 13 mph becoming south in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 11pm and midnight. Partly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm, mainly before 4am, then rain after 4am. Low around 42. Southwest wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    Low: 42 °F

    Showers

  • Friday

    Friday: Rain, mainly before 7am. High near 52. North wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 52 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 77. Southeast wind 5 to 13 mph becoming south in the afternoon.
Tonight
A slight chance of showers and thunderstorms between 11pm and midnight. Partly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 89. Southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Thursday Night
Showers and possibly a thunderstorm, mainly before 4am, then rain after 4am. Low around 42. Southwest wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Friday
Rain, mainly before 7am. High near 52. North wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday Night
Mostly clear, with a low around 32.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Partly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 52.
Monday
A 20 percent chance of rain and thunderstorms. Mostly sunny, with a high near 81.
Monday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 60.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 80.
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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:
3:51 am CDT Mar 25, 2026
Forecast Valid:
5am CDT Mar 25, 2026-6pm CDT Mar 31, 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