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.

Fog/Mist

55°F

13°C

Humidity 95%
Wind Speed NE 7 mph
Barometer 29.93 in
Dewpoint 54°F (12°C)
Visibility 5.00 mi
Wind Chill53°F (12°C)
Last update 1 Apr 10:15 pm CDT
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a temperature rising to around 59 by 5am. East wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 54 °F⇑

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 76. Breezy, with a south wind 17 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 80%.

    High: 76 °F

    Breezy.
    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Partly cloudy, with a low around 62. Breezy, with a south wind 17 to 22 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. South wind 7 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 54. South wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    Low: 54 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a steady temperature around 58. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a temperature rising to around 59 by 5am. East wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 76. Breezy, with a south wind 17 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Partly cloudy, with a low around 62. Breezy, with a south wind 17 to 22 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%.
Friday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. South wind 7 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Friday Night
Showers and possibly a thunderstorm. Low around 54. South wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a steady temperature around 58. Chance of precipitation is 70%.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Sunny, with a high near 57.
Sunday Night
Clear, with a low around 37.
Monday
Sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 58.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 65.
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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:
10:31 pm CDT Apr 1, 2026
Forecast Valid:
10pm CDT Apr 1, 2026-6pm CDT Apr 8, 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