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.

Light Drizzle

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 5 May 10:15 pm CDT
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Showers, mainly before 2am. Low around 44. North wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.

    Low: 44 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 1pm. Partly sunny, with a high near 59. North wind 6 to 9 mph. Chance of precipitation is 20%.

    High: 59 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 41. North wind 5 to 7 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then becoming sunny, with a high near 65. Calm wind becoming west 5 to 9 mph in the morning.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46. South wind 3 to 6 mph.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers, mainly before 2am. Low around 44. North wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.
Wednesday
A slight chance of showers between 7am and 1pm. Partly sunny, with a high near 59. North wind 6 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 41. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Mostly cloudy through mid morning, then becoming sunny, with a high near 65. Calm wind becoming west 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 46. South wind 3 to 6 mph.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 50%.
Saturday
Sunny, with a high near 79.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 73. Chance of precipitation is 50%.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 50.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.9°N 90.05°W (Elev. 512 ft)
Last Update:
9:36 pm CDT May 5, 2026
Forecast Valid:
10pm CDT May 5, 2026-6pm CDT May 12, 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