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

57°F

14°C

Humidity 82%
Wind Speed SE 5 mph
Barometer 30.13 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 12 May 7:50 am CDT
Extended Forecast for

Bethalto IL

  • Today

    Today: Sunny, with a high near 81. Southwest wind 6 to 15 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 9pm and 1am. Mostly cloudy, then gradually becoming clear, with a low around 57. Southwest wind 8 to 11 mph becoming northwest after midnight. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 73. Northwest wind 9 to 17 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48. North wind 5 to 10 mph becoming light and variable in the evening.

    Low: 48 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 73. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 81. Southwest wind 6 to 15 mph, with gusts as high as 22 mph.
Tonight
A slight chance of showers and thunderstorms between 9pm and 1am. Mostly cloudy, then gradually becoming clear, with a low around 57. Southwest wind 8 to 11 mph becoming northwest after midnight. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 73. Northwest wind 9 to 17 mph.
Wednesday Night
Clear, with a low around 48. North wind 5 to 10 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 73. Calm wind becoming southeast 5 to 8 mph in the morning.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 55.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.
Saturday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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 90.05°W (Elev. 525 ft)
Last Update:
6:21 am CDT May 12, 2026
Forecast Valid:
8am CDT May 12, 2026-6pm CDT May 18, 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