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

70°F

21°C

Humidity 76%
Wind Speed W 10 mph
Barometer 29.85 in (1009.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 17 Jun 2:52 am CDT
Extended Forecast for

Jefferson SD

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly before 5am. Cloudy, with a low around 65. North wind around 5 mph.

    Low: 65 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 79. South southeast wind 5 to 10 mph becoming north in the morning. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 60. East northeast wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. North wind 5 to 10 mph.

    High: 79 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. North northwest wind around 5 mph becoming south southwest after midnight.

    Low: 60 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 91. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Friday

    Friday: Sunny and hot, with a high near 98. Breezy.

    High: 98 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly before 5am. Cloudy, with a low around 65. North wind around 5 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 79. South southeast wind 5 to 10 mph becoming north in the morning. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 60. East northeast wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. North wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 60. North northwest wind around 5 mph becoming south southwest after midnight.
Juneteenth
Sunny, with a high near 91. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 69.
Friday
Sunny and hot, with a high near 98. Breezy.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny and hot, with a high near 98. Breezy.
Saturday Night
Mostly clear, with a low around 76. Breezy.
Sunday
Sunny and hot, with a high near 99. Breezy.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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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:
3:01 am CDT Jun 17, 2025
Forecast Valid:
3am CDT Jun 17, 2025-6pm CDT Jun 23, 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