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

91°F

33°C

Humidity 50%
Wind Speed S 20 G 29 mph
Barometer 29.55 in (999.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 21 Jun 11:52 am CDT
Extended Forecast for

4 Miles E Jefferson SD

Extreme Heat Warning June 21, 12:05pm until June 22, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 21, 12:05pm until June 22, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 102 °F

    Hot and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 79. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.

    Low: 79 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 100. Heat index values as high as 106. Breezy, with a south wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 100 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 1am. Increasing clouds, with a low around 69. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely and
    Breezy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. North wind around 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. East northeast wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 66. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 102. Heat index values as high as 109. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 79. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.
Sunday
Sunny and hot, with a high near 100. Heat index values as high as 106. Breezy, with a south wind 20 to 25 mph, with gusts as high as 35 mph.
Sunday Night
Showers and thunderstorms likely, mainly before 1am. Increasing clouds, with a low around 69. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. North wind around 15 mph, with gusts as high as 20 mph.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. East northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 66. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Jefferson SD
 42.61°N 96.48°W (Elev. 1207 ft)
Last Update:
10:46 am CDT Jun 21, 2025
Forecast Valid:
12pm CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
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Additional Resources

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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