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

90°F

32°C

Humidity 31%
Wind Speed S 15 G 18 mph
Barometer 29.65 in (1003.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 15 May 1:52 pm CDT
Extended Forecast for

Sioux City IA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 90. Southwest wind around 5 mph.

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Some of the storms could be severe. Partly cloudy, with a low around 55. North northwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 20 mph.

    Low: 55 °F

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. North northeast wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 56. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 56 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 89. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    High: 89 °F

    Breezy.
    Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Some of the storms could be severe. Low around 55. South wind 5 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    Low: 55 °F

    Severe
    Thunderstorms

  • Monday

    Monday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Chance
    Showers then
    Showers

  • Monday Night

    Monday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 44. Breezy.

    Low: 44 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. Breezy.

    High: 60 °F

    Partly Sunny
    and Breezy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 90. Southwest wind around 5 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Some of the storms could be severe. Partly cloudy, with a low around 55. North northwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 86. North northeast wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 56. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Sunday
Showers and thunderstorms likely, mainly after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 89. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Some of the storms could be severe. Low around 55. South wind 5 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Monday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 77. Chance of precipitation is 80%.
Monday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 44. Breezy.
Tuesday
Partly sunny, with a high near 60. Breezy.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Partly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sioux City IA
 42.5°N 96.39°W (Elev. 1099 ft)
Last Update:
1:53 pm CDT May 15, 2026
Forecast Valid:
3pm CDT May 15, 2026-6pm CDT May 21, 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