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

Hazardous Weather Conditions

Current conditions at

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

A Few Clouds

88°F

31°C

Humidity 66%
Wind Speed S 15 mph
Barometer 29.64 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 20 Jun 12:35 pm CDT
Extended Forecast for

Alton IA

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

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 97 °F

    Hot and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 75. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.

    Low: 75 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 108. Breezy, with a south wind 20 to 25 mph, with gusts as high as 30 mph.

    High: 100 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.

    Low: 76 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 98. Windy, with a south wind 20 to 30 mph.

    High: 98 °F

    Hot and Windy

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Breezy, with a south southwest wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.

    Low: 67 °F

    T-storms
    Likely and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 97. Heat index values as high as 108. Breezy, with a south wind 20 to 25 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 75. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 108. Breezy, with a south wind 20 to 25 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 76. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.
Sunday
Sunny and hot, with a high near 98. Windy, with a south wind 20 to 30 mph.
Sunday Night
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Breezy, with a south southwest wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Monday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Alton IA
 43°N 96.01°W (Elev. 1289 ft)
Last Update:
11:31 am CDT Jun 20, 2025
Forecast Valid:
12pm CDT Jun 20, 2025-6pm CDT Jun 26, 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