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

29°F

-2°C

Humidity 89%
Wind Speed Calm
Barometer 29.85 in (1012.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 2 Dec 11:52 pm CST
Extended Forecast for

Jefferson SD

  • Overnight

    Overnight: A slight chance of freezing rain before 3am, then a slight chance of snow between 3am and 5am, then a chance of flurries after 5am. Cloudy, with a low around 16. North northwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 16 °F

    Slight Chance
    Wintry Mix

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 10 by 5pm. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 23 °F⇓

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -9. North northwest wind around 5 mph becoming calm in the evening.

    Low: -9 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 23. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 23 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a steady temperature around 20. South wind 5 to 15 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 20 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 32. West northwest wind 5 to 10 mph.

    High: 32 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after noon. Cloudy, with a high near 28.

    High: 28 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow

Detailed Forecast

Overnight
A slight chance of freezing rain before 3am, then a slight chance of snow between 3am and 5am, then a chance of flurries after 5am. Cloudy, with a low around 16. North northwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a temperature falling to around 10 by 5pm. North wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around -9. North northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 23. South wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a steady temperature around 20. South wind 5 to 15 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Friday
Mostly cloudy, with a high near 32. West northwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 16.
Saturday
A 30 percent chance of snow, mainly after noon. Cloudy, with a high near 28.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
Sunday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 19.
Sunday Night
Mostly cloudy, with a low around 5.
Monday
Mostly cloudy, with a high near 31.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jefferson SD
 42.61°N 96.56°W (Elev. 1125 ft)
Last Update:
9:48 pm CST Dec 2, 2025
Forecast Valid:
12am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
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