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.

Fog/Mist

64°F

18°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.76 in
Dewpoint 64°F (18°C)
Visibility 3.00 mi
Last update 30 Sep 1:15 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, cloudy, with a steady temperature around 64. South wind around 5 mph becoming calm.

    Low: 64 °F

    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before noon. Otherwise, mostly cloudy, with a high near 73. Calm wind.

    High: 73 °F

    Areas Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A slight chance of showers between 1am and 4am. Cloudy, with a low around 58. Calm wind becoming north northeast around 5 mph after midnight. Chance of precipitation is 20%.

    Low: 58 °F

    Cloudy then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, with a high near 64. North northeast wind 10 to 15 mph.

    High: 64 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47. North wind around 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 62. North northeast wind around 5 mph becoming east in the afternoon.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, cloudy, with a steady temperature around 64. South wind around 5 mph becoming calm.
Wednesday
Areas of fog before noon. Otherwise, mostly cloudy, with a high near 73. Calm wind.
Wednesday Night
A slight chance of showers between 1am and 4am. Cloudy, with a low around 58. Calm wind becoming north northeast around 5 mph after midnight. Chance of precipitation is 20%.
Thursday
Mostly cloudy, with a high near 64. North northeast wind 10 to 15 mph.
Thursday Night
Partly cloudy, with a low around 47. North wind around 5 mph.
Friday
Sunny, with a high near 62. North northeast wind around 5 mph becoming east in the afternoon.
Friday Night
Mostly clear, with a low around 49.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 46.
Monday
Mostly sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 66.
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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:
11:48 pm CDT Sep 29, 2026
Forecast Valid:
1am CDT Sep 30, 2026-6pm CDT Oct 6, 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