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.

Partly Cloudy

85°F

29°C

Humidity 72%
Wind Speed NE 12 G 16 mph
Barometer 29.80 in (1007.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 12 Aug 11:52 am CDT
Extended Forecast for

Jefferson SD

  • This Afternoon

    This Afternoon: Patchy smoke after 4pm. Mostly sunny, with a high near 89. East wind around 10 mph.

    High: 89 °F

    Patchy Smoke

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Some of the storms could produce heavy rainfall. Patchy smoke before 2am. Increasing clouds, with a low around 67. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

    Low: 67 °F

    Slight Chance
    T-storms then
    Heavy Rain

  • Thursday

    Thursday: Showers and thunderstorms likely before 3pm, then a slight chance of showers between 3pm and 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 78. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Heavy Rain
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of thunderstorms, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 63. East wind 10 to 15 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Cloudy, with a high near 78. East southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 5 to 10 mph becoming light after midnight.

    Low: 65 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, with a high near 75.

    High: 75 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Patchy smoke after 4pm. Mostly sunny, with a high near 89. East wind around 10 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Some of the storms could produce heavy rainfall. Patchy smoke before 2am. Increasing clouds, with a low around 67. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Thursday
Showers and thunderstorms likely before 3pm, then a slight chance of showers between 3pm and 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 78. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of thunderstorms, then a chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 63. East wind 10 to 15 mph. Chance of precipitation is 50%.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Cloudy, with a high near 78. East southeast wind around 10 mph, with gusts as high as 20 mph.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 5 to 10 mph becoming light after midnight.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Sunday
Mostly cloudy, with a high near 75.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Partly sunny, with a high near 75.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Tuesday
Partly sunny, with a high near 79.
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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:
10:58 am CDT Aug 12, 2026
Forecast Valid:
12pm CDT Aug 12, 2026-6pm CDT Aug 18, 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