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.

Overcast

61°F

16°C

Humidity 94%
Wind Speed NE 7 mph
Barometer 30.01 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Jun 1:15 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. North wind around 5 mph becoming calm.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of sprinkles before 8am, then a slight chance of showers between 8am and 9am. Partly sunny, with a high near 77. Calm wind becoming south around 5 mph. Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South wind 5 to 15 mph. Chance of precipitation is 60%.

    High: 77 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57. Southwest wind 5 to 10 mph.

    Low: 57 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 77. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. North wind around 5 mph becoming calm.
Monday
A chance of sprinkles before 8am, then a slight chance of showers between 8am and 9am. Partly sunny, with a high near 77. Calm wind becoming south around 5 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. South wind 5 to 15 mph. Chance of precipitation is 60%.
Tuesday Night
A 50 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 57. Southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 77. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 57.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 77.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 62.
Saturday
Partly sunny, with a high near 83. Breezy.
Saturday Night
A 40 percent chance of showers. Partly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 87. Breezy.
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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:
9:33 pm CDT Jun 21, 2026
Forecast Valid:
1am CDT Jun 22, 2026-6pm CDT Jun 28, 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