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

Hazardous Weather Conditions

Current conditions at

Sioux City, Sioux Gateway Airport (KSUX)

Lat: 42.4°NLon: 96.38°WElev: 1099ft.

Mostly Cloudy

15°F

-9°C

Humidity 70%
Wind Speed Calm
Barometer 29.88 in (1014.3 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 18 Jan 8:52 am CST
Extended Forecast for

Sioux City IA

Winter Weather Advisory January 18, 09:34am until January 18, 09:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 18, 09:34am until January 18, 09:00pm

    NOW until 9:00pm Sun

    Winter Weather Advisory

  • Today

    High: 30 °F

    Blustery.
    Partly Sunny
    then Slight
    Chance Snow

  • Tonight

    Tonight: Partly cloudy, with a low around 0. Blustery, with a north northwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.

    Low: 0 °F

    Partly Cloudy
    and Blustery

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 17. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 17 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 3. West northwest wind around 5 mph becoming southwest after midnight.

    Low: 3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 30. South wind around 5 mph.

    High: 30 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. South wind 5 to 10 mph becoming west northwest in the evening.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

Detailed Forecast

Today
A slight chance of snow between noon and 4pm. Partly sunny, with a high near 30. Blustery, with a southwest wind 10 to 15 mph becoming north northwest 20 to 25 mph in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 0. Blustery, with a north northwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.
M.L.King Day
Mostly sunny, with a high near 17. West wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 3. West northwest wind around 5 mph becoming southwest after midnight.
Tuesday
Increasing clouds, with a high near 30. South wind around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 17. South wind 5 to 10 mph becoming west northwest in the evening.
Wednesday
Partly sunny, with a high near 32.
Wednesday Night
Partly cloudy, with a low around 10.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Mostly cloudy, with a high near 20.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around -2.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 6.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sioux City IA
 42.5°N 96.39°W (Elev. 1099 ft)
Last Update:
9:09 am CST Jan 18, 2026
Forecast Valid:
9am CST Jan 18, 2026-6pm CST Jan 24, 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