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

59°F

15°C

Humidity 54%
Wind Speed S 10 mph
Barometer 30.15 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 9 Apr 3:35 am CDT
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: Mostly clear, with a low around 53. South wind around 9 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. South wind around 11 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. South wind around 10 mph becoming north in the afternoon. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 50. Northeast wind around 6 mph.

    Low: 50 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Breezy.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 53. South wind around 9 mph.
Thursday
Sunny, with a high near 80. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 58. South wind around 11 mph.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. South wind around 10 mph becoming north in the afternoon. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50. Northeast wind around 6 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Breezy.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 83.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 74.
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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:
1:26 am CDT Apr 9, 2026
Forecast Valid:
3am CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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