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.

Fair

81°F

27°C

Humidity 67%
Wind Speed NW 14 G 26 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 7 Aug 3:52 pm CDT
Extended Forecast for

Jefferson SD

  • Tonight

    Tonight: Partly cloudy, with a low around 56. North northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers between noon and 3pm. Partly sunny, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 88. South southeast wind 5 to 10 mph.

    High: 88 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. East wind 5 to 10 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 86. East wind 5 to 10 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 83.

    High: 83 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. North northwest wind 5 to 10 mph becoming light and variable in the evening.
Saturday
A slight chance of showers between noon and 3pm. Partly sunny, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 68. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 88. South southeast wind 5 to 10 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. East wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 86. East wind 5 to 10 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
Mostly cloudy, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly cloudy, with a high near 79.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Thursday
Mostly cloudy, with a high near 75.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 60.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 72.
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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:
4:23 pm CDT Aug 7, 2026
Forecast Valid:
4pm CDT Aug 7, 2026-6pm CDT Aug 14, 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