Hazardous Weather Conditions

Current conditions at

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

Overcast

54°F

12°C

Humidity 94%
Wind Speed NW 13 mph
Barometer 29.68 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 18 May 3:15 am CDT
Extended Forecast for

Alton IA

  • Overnight

    Overnight: Cloudy, with a steady temperature around 54. Northwest wind around 10 mph.

    Low: 54 °F

    Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after noon.  Cloudy, with a high near 66. North northwest wind 5 to 10 mph becoming northeast in the afternoon.

    High: 66 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm.  Low around 43. Breezy, with a north northwest wind 15 to 20 mph.  Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 43 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 58. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 58 °F

    Decreasing
    Clouds and
    Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36. North northwest wind 10 to 15 mph becoming light north  in the evening. Winds could gust as high as 20 mph.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Overnight
Cloudy, with a steady temperature around 54. Northwest wind around 10 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after noon. Cloudy, with a high near 66. North northwest wind 5 to 10 mph becoming northeast in the afternoon.
Monday Night
Showers and possibly a thunderstorm. Low around 43. Breezy, with a north northwest wind 15 to 20 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 58. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 36. North northwest wind 10 to 15 mph becoming light north in the evening. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 63. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Mostly cloudy, with a high near 66.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 44.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Saturday
Partly sunny, with a high near 75.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Alton IA
 43°N 96.01°W (Elev. 1289 ft)
1:33 am CDT May 18, 2026
3am CDT May 18, 2026-6pm CDT May 24, 2026
 
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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