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 and Breezy

82°F

28°C

Humidity 62%
Wind Speed S 23 G 31 mph
Barometer 29.49 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 21 Jun 1:55 am CDT
Extended Forecast for

Alton IA

Extreme Heat Warning June 21, 02:12am until June 22, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 21, 02:12am until June 22, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • Overnight

    Low: 77 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 107. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 100 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 97. Heat index values as high as 100. Breezy, with a south wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 97 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 67 °F

    Chance
    T-storms and
    Breezy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 82. West northwest wind around 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 76. Chance of precipitation is 80%.

    High: 76 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 77. Breezy, with a south wind 20 to 25 mph, with gusts as high as 30 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 107. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph.
Saturday Night
Mostly clear, with a low around 77. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.
Sunday
Sunny and hot, with a high near 97. Heat index values as high as 100. Breezy, with a south wind 20 to 25 mph, with gusts as high as 35 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 82. West northwest wind around 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Tuesday
Showers and possibly a thunderstorm. High near 76. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Friday
Partly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alton IA
 42.98°N 96.04°W (Elev. 1362 ft)
Last Update:
11:05 pm CDT Jun 20, 2025
Forecast Valid:
2am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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