Iowa · NWS FSD office

Sioux City, IA weather

It is 55°F and mostly clear at Sioux City, Sioux Gateway Airport as of Oct 28, 4:15 AM CDT. Overnight: Mostly Cloudy, low near 51°F, 5% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 2:03 AM CDT.

Updated Oct 28, 4:17 AM CDT (snapshot)

Current conditions

Temperature

55°F

Mostly Clear

Wind

SE 6 mph

Humidity 94% · dew point 54°F

Pressure · visibility

29.99 inHg

Visibility 7 mi

Observed at Sioux City, Sioux Gateway Airport (KSUX), Oct 28, 4:15 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Sioux City forecast zone right now.

Around the NWS FSD forecast area

No active alerts in zones served by the FSD office near Sioux City.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in Iowa.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Sioux City (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM55°FMostly Cloudy4%SSE 5 mph
Wed 5 AM55°FMostly Cloudy5%SE 5 mph
Wed 6 AM54°FPartly Sunny4%SE 5 mph
Wed 7 AM54°FMostly Sunny1%SE 5 mph
Wed 8 AM55°FMostly Cloudy8%SSE 10 mph
Wed 9 AM56°FMostly Cloudy6%SSE 10 mph
Wed 10 AM60°FPartly Sunny7%SSE 10 mph
Wed 11 AM63°FPartly Sunny8%S 10 mph
Wed 12 PM67°FMostly Sunny7%S 15 mph
Wed 1 PM69°FPartly Sunny7%S 15 mph
Wed 2 PM70°FSlight Chance Rain Showers18%S 10 mph
Wed 3 PM71°FSlight Chance Rain Showers16%SSW 10 mph
Wed 4 PM70°FChance Showers And Thunderstorms34%SW 10 mph
Wed 5 PM70°FChance Showers And Thunderstorms38%SW 5 mph
Wed 6 PM68°FSlight Chance Showers And Thunderstorms23%WSW 5 mph
Wed 7 PM65°FMostly Cloudy2%W 5 mph
Wed 8 PM62°FPartly Cloudy1%WNW 5 mph
Wed 9 PM60°FPartly Cloudy0%WNW 5 mph
Wed 10 PM58°FPartly Cloudy0%NW 5 mph
Wed 11 PM56°FMostly Clear0%NW 5 mph
Thu 12 AM54°FMostly Clear0%NNW 5 mph
Thu 1 AM52°FPartly Cloudy0%NNW 5 mph
Thu 2 AM51°FPartly Cloudy0%NNW 5 mph
Thu 3 AM49°FMostly Cloudy0%NNW 5 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Sioux City can differ.

7-day forecast

Overnight

Low 51°F

Mostly cloudy. Low around 51, with temperatures rising to around 55 overnight. Southeast wind around 5 mph.

Wednesday

High 72°F·Low 43°F

A slight chance of rain showers between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 72. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

Wednesday Night: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 43. Northwest wind around 5 mph. Chance of precipitation is 20%.

Thursday

High 66°F·Low 46°F

Sunny, with a high near 66. East northeast wind 0 to 5 mph.

Thursday Night: A chance of rain showers after 1am. Partly cloudy, with a low around 46. East wind around 5 mph. Chance of precipitation is 30%.

Friday

High 64°F·Low 49°F

A chance of rain showers. Mostly cloudy, with a high near 64. East wind around 5 mph. Chance of precipitation is 30%.

Friday Night: A chance of rain showers before 1am, then showers and thunderstorms likely. Cloudy, with a low around 49. Chance of precipitation is 60%.

Saturday

High 65°F·Low 51°F

Showers and thunderstorms likely. Cloudy, with a high near 65. Chance of precipitation is 60%.

Saturday Night: A chance of rain showers. Cloudy, with a low around 51. Chance of precipitation is 30%.

Sunday

High 66°F·Low 53°F

A slight chance of rain showers before noon. Mostly cloudy, with a high near 66.

Sunday Night: A chance of rain showers after midnight. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.

Monday

High 64°F·Low 49°F

Rain showers likely. Cloudy, with a high near 64. Chance of precipitation is 70%.

Monday Night: Rain showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

Tuesday

High 60°F

Rain showers likely. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.

Nearby cities

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About this forecast

Forecast office
Sioux City is served by the National Weather Service FSD forecast office, forecast zone IAZ031, county zone IAC193.
Location used
The Census Bureau's internal point for Sioux City (42.4954, -96.3895), in Woodbury County. Population: 86,875 (2024 estimate), number 4 of the 27 Iowa cities on this site.
Radar
Nearest NWS radar: KFSD. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.4954,-96.3895 (forecast issued Oct 28, 2:03 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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