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

68°F

20°C

Humidity 43%
Wind Speed S 15 mph
Barometer 30.11 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 9 Apr 9:45 pm CDT
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. South wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Showers and thunderstorms likely before 4pm, then a chance of showers. Cloudy, with a high near 69. Southwest wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 70%.

    High: 69 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly after 7pm. Mostly cloudy, with a low around 49. East wind around 6 mph.

    Low: 49 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Southeast wind 7 to 10 mph. Chance of precipitation is 30%.

    High: 72 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 59. Southeast wind 8 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 78. Breezy.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 58. South wind 11 to 13 mph, with gusts as high as 21 mph.
Friday
Showers and thunderstorms likely before 4pm, then a chance of showers. Cloudy, with a high near 69. Southwest wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers, mainly after 7pm. Mostly cloudy, with a low around 49. East wind around 6 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Southeast wind 7 to 10 mph. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 59. Southeast wind 8 to 10 mph.
Sunday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 78. Breezy.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 78.
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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:
8:26 pm CDT Apr 9, 2026
Forecast Valid:
9pm CDT Apr 9, 2026-6pm CDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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