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.

Fair

86°F

30°C

Humidity 55%
Wind Speed S 16 mph
Barometer 29.82 in (1008.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 15 Jul 5:52 pm CDT
Extended Forecast for

Jefferson SD

  • Tonight

    Tonight: Showers and thunderstorms likely between 11pm and 4am, then a chance of showers. Mostly cloudy, with a low around 66. South southeast wind 5 to 15 mph becoming north northwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. North northwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly before 7pm. Mostly cloudy, with a low around 55. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 74. North wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. East wind around 5 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Partly sunny, with a high near 86.

    High: 86 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely between 11pm and 4am, then a chance of showers. Mostly cloudy, with a low around 66. South southeast wind 5 to 15 mph becoming north northwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. North northwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers, mainly before 7pm. Mostly cloudy, with a low around 55. North wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 74. North wind 5 to 10 mph becoming east northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 57. East wind around 5 mph.
Friday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 86.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 65.
Sunday
Partly sunny, with a high near 84.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jefferson SD
 42.61°N 96.56°W (Elev. 1125 ft)
Last Update:
6:33 pm CDT Jul 15, 2025
Forecast Valid:
6pm CDT Jul 15, 2025-6pm CDT Jul 22, 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