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.

Fog/Mist

70°F

21°C

Humidity 97%
Wind Speed S 6 mph
Barometer 29.94 in (1013.4 mb)
Dewpoint 69°F (21°C)
Visibility 4.00 mi
Last update 24 Jul 11:52 pm CDT
Extended Forecast for

North Sioux City SD

Extreme Heat Warning July 25, 12:00pm until July 26, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 68. South southeast wind around 10 mph.

    Low: 68 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 5 to 10 mph.

    High: 98 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 75. South wind 5 to 10 mph becoming west northwest in the evening.

    Low: 75 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 110. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 76. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 97. West northwest wind 5 to 10 mph becoming northeast in the afternoon.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 93.

    High: 93 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 68. South southeast wind around 10 mph.
Saturday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 75. South wind 5 to 10 mph becoming west northwest in the evening.
Sunday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 110. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 76. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 97. West northwest wind 5 to 10 mph becoming northeast in the afternoon.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Partly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 70.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday
Partly sunny, with a high near 92.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 69.
Friday
Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
North Sioux City SD
 42.54°N 96.5°W (Elev. 1099 ft)
Last Update:
11:58 pm CDT Jul 24, 2026
Forecast Valid:
12am CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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