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.

Overcast

46°F

8°C

Humidity 93%
Wind Speed E 8 mph
Barometer 30.41 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 25 Oct 9:35 am CDT
Extended Forecast for

Alton IA

  • Today

    Today: A 20 percent chance of showers before 10am. Mostly cloudy, with a high near 57. Northeast wind 5 to 10 mph.

    High: 57 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers, mainly after midnight. Cloudy, with a low around 41. Northeast wind around 10 mph.

    Low: 41 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before noon. Cloudy, with a high near 60. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 47. East wind 10 to 15 mph becoming southwest after midnight.

    Low: 47 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 66. South wind 5 to 10 mph.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 49. South wind 5 to 10 mph.

    Low: 49 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 10am. Mostly cloudy, with a high near 57. Northeast wind 5 to 10 mph.
Tonight
A 50 percent chance of showers, mainly after midnight. Cloudy, with a low around 41. Northeast wind around 10 mph.
Monday
Showers likely, mainly before noon. Cloudy, with a high near 60. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 47. East wind 10 to 15 mph becoming southwest after midnight.
Tuesday
Partly sunny, with a high near 66. South wind 5 to 10 mph.
Tuesday Night
A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 49. South wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 69.
Thursday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 53.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 72.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 54.
Saturday
Showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Alton IA
 42.98°N 96.01°W (Elev. 1283 ft)
Last Update:
6:33 am CDT Oct 25, 2026
Forecast Valid:
9am CDT Oct 25, 2026-6pm CDT Oct 31, 2026
 
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