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.

Rain

45°F

7°C

Humidity 100%
Wind Speed N 16 G 23 mph
Barometer 29.96 in
Dewpoint 45°F (7°C)
Visibility 3.00 mi
Wind Chill38°F (3°C)
Last update 25 Apr 6:35 pm CDT
Extended Forecast for

Alton IA

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 10pm. Low around 43. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 65. East northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 52. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 52 °F

    T-storms then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 63. Breezy, with a south southeast wind 10 to 15 mph becoming west northwest 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    High: 63 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 36. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Breezy.
    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers, with thunderstorms also possible after 10pm. Low around 43. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 65. East northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm. Low around 52. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Monday
Showers and possibly a thunderstorm. High near 63. Breezy, with a south southeast wind 10 to 15 mph becoming west northwest 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Monday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 36. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 56. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 37.
Saturday
Sunny, with a high near 69.
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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:
4:28 pm CDT Apr 25, 2026
Forecast Valid:
6pm CDT Apr 25, 2026-6pm CDT May 2, 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