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

Sioux City, Sioux Gateway Airport (KSUX)

Lat: 42.4°NLon: 96.38°WElev: 1099ft.

Overcast

25°F

-4°C

Humidity 88%
Wind Speed N 9 mph
Barometer 29.94 in (1015.3 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 1 Jan 11:52 pm CST
Extended Forecast for

Jefferson SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 19. Calm wind.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of flurries between 1pm and 2pm, then a chance of snow after 2pm. Cloudy, with a high near 29. East wind around 5 mph. Chance of precipitation is 30%.

    High: 29 °F

    Cloudy then
    Chance Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow before 9pm. Mostly cloudy, with a low around 21. East wind around 5 mph becoming calm in the evening.

    Low: 21 °F

    Chance Snow
    then Mostly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 40. South wind around 5 mph becoming north in the afternoon.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23. Light and variable wind becoming southeast 5 to 10 mph after midnight.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 47. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 47 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 19. Calm wind.
Friday
A chance of flurries between 1pm and 2pm, then a chance of snow after 2pm. Cloudy, with a high near 29. East wind around 5 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of snow before 9pm. Mostly cloudy, with a low around 21. East wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 40. South wind around 5 mph becoming north in the afternoon.
Saturday Night
Partly cloudy, with a low around 23. Light and variable wind becoming southeast 5 to 10 mph after midnight.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 47. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 29.
Monday
Partly sunny, with a high near 49.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 49.
Tuesday Night
Mostly clear, with a low around 28.
Wednesday
Sunny, with a high near 51.
Wednesday Night
Partly cloudy, with a low around 29.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 47.
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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:
10:58 pm CST Jan 1, 2026
Forecast Valid:
12am CST Jan 2, 2026-6pm CST Jan 8, 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