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.

A Few Clouds

86°F

30°C

Humidity 66%
Wind Speed E 10 mph
Barometer 29.93 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 1 Sep 1:35 pm CDT
Extended Forecast for

Rock Valley IA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 88. Southeast wind 5 to 10 mph.

    High: 88 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Low around 64. East southeast wind 5 to 10 mph becoming north northeast in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Severe
    Thunderstorms

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 68. East wind around 5 mph.

    Low: 68 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 90. South wind 5 to 10 mph.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 70. South wind around 5 mph.

    Low: 70 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 88. Southeast wind 5 to 10 mph.
Tonight
Showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Low around 64. East southeast wind 5 to 10 mph becoming north northeast in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 68. East wind around 5 mph.
Thursday
Sunny, with a high near 90. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 70. South wind around 5 mph.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 69.
Saturday
Mostly sunny, with a high near 91.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 87.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Labor Day
Partly sunny, with a high near 83.
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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:
1:48 pm CDT Sep 1, 2026
Forecast Valid:
1pm CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation