National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Sioux County Regional Airport (KSXK)

Lat: 42.99°NLon: 96.16°WElev: 1409ft.

Overcast

57°F

14°C

Humidity 94%
Wind Speed NE 10 mph
Barometer 30.16 in
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 21 Sep 5:35 pm CDT
Extended Forecast for

Rock Valley IA

  • This Afternoon

    This Afternoon: Drizzle likely. Patchy fog. Otherwise, cloudy, with a high near 58. Northeast wind around 10 mph.

    High: 58 °F

    Drizzle
    Likely and
    Patchy Fog

  • Tonight

    Tonight: Drizzle likely, mainly before 11pm. Patchy fog. Otherwise, cloudy, with a low around 52. East northeast wind around 5 mph.

    Low: 52 °F

    Drizzle
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of drizzle before 11am. Areas of fog before 1pm. Otherwise, cloudy, with a high near 60. East wind 5 to 10 mph.

    High: 60 °F

    Slight Chance
    Drizzle and
    Areas Fog
    then Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. East southeast wind around 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 65. South southeast wind 5 to 10 mph.

    High: 65 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A slight chance of showers, then showers and possibly a thunderstorm after 1am. Low around 51. South southeast wind around 10 mph. Chance of precipitation is 80%.

    Low: 51 °F

    Slight Chance
    Showers then
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Mostly cloudy, with a high near 65.

    High: 65 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of drizzle after 1am. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy
    then Chance
    Drizzle

  • Friday

    Friday: A chance of drizzle before 1pm, then a chance of showers after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.

    High: 66 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Drizzle likely. Patchy fog. Otherwise, cloudy, with a high near 58. Northeast wind around 10 mph.
Tonight
Drizzle likely, mainly before 11pm. Patchy fog. Otherwise, cloudy, with a low around 52. East northeast wind around 5 mph.
Tuesday
A slight chance of drizzle before 11am. Areas of fog before 1pm. Otherwise, cloudy, with a high near 60. East wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 48. East southeast wind around 5 mph.
Wednesday
Mostly cloudy, with a high near 65. South southeast wind 5 to 10 mph.
Wednesday Night
A slight chance of showers, then showers and possibly a thunderstorm after 1am. Low around 51. South southeast wind around 10 mph. Chance of precipitation is 80%.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 65.
Thursday Night
A chance of drizzle after 1am. Mostly cloudy, with a low around 53.
Friday
A chance of drizzle before 1pm, then a chance of showers after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.
Friday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Saturday
A chance of drizzle. Mostly cloudy, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
Partly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 56.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rock Valley IA
 43.22°N 96.31°W (Elev. 1230 ft)
Last Update:
4:28 pm CDT Sep 21, 2026
Forecast Valid:
5pm CDT Sep 21, 2026-6pm CDT Sep 28, 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