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

68°F

20°C

Humidity 84%
Wind Speed W 5 mph
Barometer 29.90 in (1011.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Jun 8:52 pm CDT
Extended Forecast for

Sioux City IA

Extreme Heat Watch June 20, 11:00am until June 21, 10:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: Mostly clear, with a low around 59. North northwest wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 92. South southwest wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Heat index values as high as 107. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 101 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny and hot, with a high near 102. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 102 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 80.

    Low: 80 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. Breezy.

    High: 100 °F

    Hot and
    Breezy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 59. North northwest wind around 5 mph becoming calm.
Juneteenth
Sunny, with a high near 92. South southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 72. South wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Sunny and hot, with a high near 101. Heat index values as high as 107. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 77. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday
Sunny and hot, with a high near 102. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph.
Saturday Night
Clear, with a low around 80.
Sunday
Sunny and hot, with a high near 100. Breezy.
Sunday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sioux City IA
 42.5°N 96.39°W (Elev. 1099 ft)
Last Update:
8:47 pm CDT Jun 18, 2025
Forecast Valid:
9pm CDT Jun 18, 2025-6pm CDT Jun 25, 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