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.

Overcast and Windy

-4°C

25°F

Humidity 60%
Wind Speed NW 50 G 81 km/h
Barometer 1018.4 mb (30.02 in)
Dewpoint -11°C (13°F)
Visibility 16 km
Wind Chill-13°C (8°F)
Last update 18 Jan 4:52 pm CST
Extended Forecast for

Sioux City IA

Winter Weather Advisory January 18, 05:22pm until January 18, 09:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 18, 05:22pm until January 18, 09:00pm

    NOW until 9:00pm Sun

    Winter Weather Advisory

  • This Afternoon

    High: -1 °C

    Slight Chance
    Snow and
    Blustery

  • Tonight

    Tonight: Partly cloudy, with a low around -18. Blustery, with a north northwest wind 30 to 40 km/h decreasing to 20 to 30 km/h after midnight. Winds could gust as high as 65 km/h.

    Low: -18 °C

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • M.L.King Day

    M.L.King Day: Increasing clouds, with a high near -8. West wind 10 to 15 km/h.

    High: -8 °C

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -17. Northwest wind 5 to 10 km/h.

    Low: -17 °C

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near -3. South wind 5 to 15 km/h.

    High: -3 °C

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around -9. South wind 10 to 15 km/h becoming northwest after midnight.

    Low: -9 °C

    Slight Chance
    Snow then
    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near -1.

    High: -1 °C

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -14.

    Low: -14 °C

    Partly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of snow. Mostly cloudy, with a high near -1. Blustery, with a north northwest wind around 40 km/h, with gusts as high as 70 km/h.
Tonight
Partly cloudy, with a low around -18. Blustery, with a north northwest wind 30 to 40 km/h decreasing to 20 to 30 km/h after midnight. Winds could gust as high as 65 km/h.
M.L.King Day
Increasing clouds, with a high near -8. West wind 10 to 15 km/h.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -17. Northwest wind 5 to 10 km/h.
Tuesday
Increasing clouds, with a high near -3. South wind 5 to 15 km/h.
Tuesday Night
A 20 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around -9. South wind 10 to 15 km/h becoming northwest after midnight.
Wednesday
Partly sunny, with a high near -1.
Wednesday Night
Partly cloudy, with a low around -14.
Thursday
Mostly sunny, with a high near -2.
Thursday Night
Mostly cloudy, with a low around -14.
Friday
Partly sunny, with a high near -9.
Friday Night
Mostly cloudy, with a low around -21.
Saturday
A 20 percent chance of snow. Mostly cloudy, with a high near -13.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around -21.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near -11.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sioux City IA
 42.5°N 96.41°W (Elev. 1106 m)
Last Update:
4:48 pm CST Jan 18, 2026
Forecast Valid:
5pm CST Jan 18, 2026-6pm CST Jan 25, 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