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

86°F

30°C

Humidity 62%
Wind Speed SW 10 mph
Barometer 30.11 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 22 Jun 9:50 am CDT
Extended Forecast for

Bethalto IL

Extreme Heat Warning June 22, 09:53am until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 22, 09:53am until June 24, 09:00pm

    NOW until 9:00pm Tue

    Extreme Heat Warning

  • Today

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 76. South wind 6 to 10 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Increasing clouds, with a high near 93. Heat index values as high as 100. South wind 6 to 9 mph.

    High: 93 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76. South wind 3 to 8 mph.

    Low: 76 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 93. South wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 102. South wind 9 to 13 mph.
Tonight
Clear, with a low around 76. South wind 6 to 10 mph.
Monday
Increasing clouds, with a high near 93. Heat index values as high as 100. South wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 76. South wind 3 to 8 mph.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 93. South wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 75.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
Sunny, with a high near 94.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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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:
9:37 am CDT Jun 22, 2025
Forecast Valid:
9am CDT Jun 22, 2025-6pm CDT Jun 28, 2025
 
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