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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast and Breezy

57°F

14°C

Humidity 77%
Wind Speed S 21 G 29 mph
Barometer 29.64 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 17 Feb 10:55 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: A slight chance of rain between midnight and 5am. Mostly cloudy, with a low around 52. Breezy, with a south wind 14 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    Rain and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 70. West wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 49. South wind 3 to 7 mph.

    Low: 49 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of rain before noon, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. South wind 7 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. West wind 11 to 16 mph, with gusts as high as 24 mph.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow, mainly after noon. Mostly sunny, with a high near 42.

    High: 42 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before midnight. Partly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain between midnight and 5am. Mostly cloudy, with a low around 52. Breezy, with a south wind 14 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 70. West wind 6 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Increasing clouds, with a low around 49. South wind 3 to 7 mph.
Thursday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. South wind 7 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Thursday Night
Mostly clear, with a low around 36. West wind 11 to 16 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A 40 percent chance of snow, mainly after noon. Mostly sunny, with a high near 42.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Partly cloudy, with a low around 25.
Sunday
A 20 percent chance of snow before noon. Sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 19.
Monday
Mostly sunny, with a high near 37.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 46.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
9:56 pm CST Feb 17, 2026
Forecast Valid:
11pm CST Feb 17, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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