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

21°F

-6°C

Humidity 81%
Wind Speed SE 12 mph
Barometer 29.99 in (1017.2 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 11 Dec 3:52 am CST
Extended Forecast for

Jefferson SD

  • Overnight

    Overnight: A chance of flurries. Cloudy, with a low around 19. East wind around 10 mph.

    Low: 19 °F

    Chance
    Flurries

  • Thursday

    Thursday: A chance of snow, freezing rain, and sleet before 3pm, then a chance of flurries between 3pm and 5pm. Cloudy, with a high near 31. Southeast wind around 10 mph becoming east northeast in the afternoon. Chance of precipitation is 50%. Little or no snow and sleet accumulation expected.

    High: 31 °F

    Chance Wintry
    Mix

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 18. North northwest wind 5 to 10 mph.

    Low: 18 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a temperature rising to near 23 by 10am, then falling to around 14 during the remainder of the day. Northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 23 °F⇓

    Mostly Cloudy

  • Friday Night

    Friday Night: Snow likely after midnight. Cloudy, with a low around 4. North northwest wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 4 °F

    Cloudy then
    Snow Likely

  • Saturday

    Saturday: Snow, mainly before noon. High near 8. North wind 5 to 10 mph. Chance of precipitation is 80%. New snow accumulation of around 2 inches.

    High: 8 °F

    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around -15.

    Low: -15 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of flurries. Cloudy, with a low around 19. East wind around 10 mph.
Thursday
A chance of snow, freezing rain, and sleet before 3pm, then a chance of flurries between 3pm and 5pm. Cloudy, with a high near 31. Southeast wind around 10 mph becoming east northeast in the afternoon. Chance of precipitation is 50%. Little or no snow and sleet accumulation expected.
Thursday Night
Mostly cloudy, with a low around 18. North northwest wind 5 to 10 mph.
Friday
Mostly cloudy, with a temperature rising to near 23 by 10am, then falling to around 14 during the remainder of the day. Northwest wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Snow likely after midnight. Cloudy, with a low around 4. North northwest wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday
Snow, mainly before noon. High near 8. North wind 5 to 10 mph. Chance of precipitation is 80%. New snow accumulation of around 2 inches.
Saturday Night
Mostly clear, with a low around -15.
Sunday
Mostly sunny, with a high near 17.
Sunday Night
Mostly clear, with a low around 8.
Monday
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 23.
Wednesday
Partly sunny, with a high near 40.
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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:
3:48 am CST Dec 11, 2025
Forecast Valid:
4am CST Dec 11, 2025-6pm CST Dec 17, 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