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

79°F

26°C

Humidity 58%
Wind Speed Vrbl 5 G 12 mph
Barometer 30.15 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 27 Aug 12:35 pm CDT
Extended Forecast for

Alton IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. Northwest wind around 5 mph becoming calm.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 83. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 67. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 86. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 86 °F

    Breezy.
    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 72. South wind around 10 mph.

    Low: 72 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 82. Northwest wind around 5 mph becoming calm.
Tonight
Mostly clear, with a low around 57. Calm wind.
Friday
Mostly sunny, with a high near 83. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 67. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
A 30 percent chance of showers before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 86. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Increasing clouds, with a low around 72. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Partly sunny, with a high near 86.
Monday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 86.
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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:
12:23 pm CDT Aug 27, 2026
Forecast Valid:
12pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation