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.

Partly Cloudy

72°F

22°C

Humidity 88%
Wind Speed N 6 mph
Barometer 29.87 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 2 Sep 6:35 am CDT
Extended Forecast for

Alton IA

  • Today

    Today: A 40 percent chance of showers and thunderstorms before 8am. Sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning.

    High: 88 °F

    Chance
    T-storms then
    Sunny

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 69. Southeast wind 5 to 10 mph.

    Low: 69 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 9am. Sunny, with a high near 89. South wind 10 to 15 mph.

    High: 89 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. South wind around 5 mph.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90. South wind 5 to 10 mph.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South southeast wind around 5 mph.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms before 8am. Sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 69. Southeast wind 5 to 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 9am. Sunny, with a high near 89. South wind 10 to 15 mph.
Thursday Night
Mostly clear, with a low around 72. South wind around 5 mph.
Friday
Sunny, with a high near 90. South wind 5 to 10 mph.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Sunday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 66. Chance of precipitation is 40%.
Labor Day
A 30 percent chance of showers. Partly sunny, with a high near 83.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 83.
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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:
6:28 am CDT Sep 2, 2026
Forecast Valid:
6am CDT Sep 2, 2026-6pm CDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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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