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

66°F

19°C

Humidity 100%
Wind Speed NW 6 mph
Barometer 29.83 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 17 Jun 2:55 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 3am. Cloudy, with a low around 62. West southwest wind around 5 mph becoming northwest.

    Low: 62 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 78. North wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 59. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 78. North northeast wind 5 to 10 mph.

    High: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 7pm. Mostly clear, with a low around 58. North northwest wind 5 to 10 mph becoming light and variable.

    Low: 58 °F

    Chance
    Showers then
    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 88. Southwest wind 5 to 10 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 91. Breezy.

    High: 91 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. Breezy.

    Low: 72 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 3am. Cloudy, with a low around 62. West southwest wind around 5 mph becoming northwest.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 78. North wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 59. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 78. North northeast wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers before 7pm. Mostly clear, with a low around 58. North northwest wind 5 to 10 mph becoming light and variable.
Juneteenth
Sunny, with a high near 88. Southwest wind 5 to 10 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Friday
Sunny, with a high near 91. Breezy.
Friday Night
Mostly clear, with a low around 72. Breezy.
Saturday
Sunny and hot, with a high near 98. Breezy.
Saturday Night
Mostly clear, with a low around 73. Breezy.
Sunday
Sunny and hot, with a high near 97. Breezy.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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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:
2:31 am CDT Jun 17, 2025
Forecast Valid:
2am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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