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

80°F

27°C

Humidity 69%
Wind Speed NW 3 mph
Barometer 29.93 in (1012.9 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 18 Aug 6:52 pm CDT
Extended Forecast for

Sioux City IA

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 63. Northwest wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 3pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 78. East wind around 5 mph becoming calm. Chance of precipitation is 50%.

    High: 78 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly clear, with a low around 61. Southeast wind around 5 mph becoming calm.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 83. Light south southeast wind becoming south 5 to 10 mph in the morning.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 63. South wind around 5 mph becoming calm after midnight.

    Low: 63 °F

    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming northwest around 5 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 10 percent chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 63. Northwest wind around 5 mph becoming calm.
Wednesday
A chance of showers and thunderstorms before 3pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 78. East wind around 5 mph becoming calm. Chance of precipitation is 50%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly clear, with a low around 61. Southeast wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 83. Light south southeast wind becoming south 5 to 10 mph in the morning.
Thursday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 63. South wind around 5 mph becoming calm after midnight.
Friday
Sunny, with a high near 83. Calm wind becoming northwest around 5 mph.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Mostly cloudy, with a high near 77.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Partly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sioux City IA
 42.48°N 96.41°W (Elev. 1093 ft)
Last Update:
6:53 pm CDT Aug 18, 2026
Forecast Valid:
7pm CDT Aug 18, 2026-6pm CDT Aug 25, 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