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

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

Partly Cloudy

66°F

19°C

Humidity 35%
Wind Speed W 12 mph
Barometer 30.20 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 7 Oct 5:35 pm CDT
Extended Forecast for

Alton IA

  • Tonight

    Tonight: Mostly clear, with a low around 38. North northwest wind around 5 mph becoming calm.

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 49. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 73. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 73 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78. South southwest wind 5 to 10 mph becoming north northeast in the afternoon.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77. Breezy.

    High: 77 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 38. North northwest wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 71. South wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 49. South southeast wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 73. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 25 mph.
Thursday Night
Mostly clear, with a low around 51. South wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 78. South southwest wind 5 to 10 mph becoming north northeast in the afternoon.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Partly sunny, with a high near 77. Breezy.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 51.
Columbus Day
Mostly sunny, with a high near 72.
Monday Night
Mostly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alton IA
 42.98°N 96.01°W (Elev. 1283 ft)
Last Update:
4:53 pm CDT Oct 7, 2025
Forecast Valid:
5pm CDT Oct 7, 2025-6pm CDT Oct 14, 2025
 
Forecast Discussion
 
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Additional Resources

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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