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

64°F

18°C

Humidity 45%
Wind Speed NW 6 mph
Barometer 30.00 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 13 May 4:15 am CDT
Extended Forecast for

Bethalto IL

  • Today

    Today: Sunny, with a high near 73. Northwest wind 8 to 17 mph, with gusts as high as 24 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 47. North wind 6 to 11 mph becoming light in the evening.

    Low: 47 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 73. Calm wind becoming southeast 5 to 9 mph in the morning.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 56. Southeast wind around 11 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 81. South wind 13 to 15 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 73. Northwest wind 8 to 17 mph, with gusts as high as 24 mph.
Tonight
Clear, with a low around 47. North wind 6 to 11 mph becoming light in the evening.
Thursday
Sunny, with a high near 73. Calm wind becoming southeast 5 to 9 mph in the morning.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 56. Southeast wind around 11 mph.
Friday
Showers likely and possibly a thunderstorm before 1pm. Partly sunny, with a high near 81. South wind 13 to 15 mph. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 64.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 69.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Breezy.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.05°W (Elev. 525 ft)
Last Update:
2:01 am CDT May 13, 2026
Forecast Valid:
4am CDT May 13, 2026-6pm CDT May 19, 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