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.

Fair

88°F

31°C

Humidity 52%
Wind Speed SW 9 mph
Barometer 29.91 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 13 Oct 1:50 pm CDT
Extended Forecast for

Bethalto IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 94. Southwest wind around 9 mph.

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 71. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 60%.

    Low: 71 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between noon and 1pm. High near 78. Light and variable wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 80%.

    High: 78 °F

    Showers and
    Patchy Fog
    then Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 3am, then showers likely between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm. Chance of precipitation is 70%.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 82. East wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 100%.

    High: 82 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 61. Breezy.

    High: 61 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 94. Southwest wind around 9 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 71. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between noon and 1pm. High near 78. Light and variable wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 80%.
Wednesday Night
A chance of showers and thunderstorms before 3am, then showers likely between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 82. East wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 100%.
Thursday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 61. Breezy.
Friday Night
Mostly clear, with a low around 35.
Saturday
Sunny, with a high near 64.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 73.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.9°N 90.05°W (Elev. 512 ft)
Last Update:
1:26 pm CDT Oct 13, 2026
Forecast Valid:
2pm CDT Oct 13, 2026-6pm CDT Oct 19, 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