Sioux City weather in September 2020

  • 24°C maximum daytime temperature in September in Sioux City24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Sioux City9
    9 days with some rainfall
  • 11°C minimum night-time temperature in September in Sioux City11
    11°C min night temperature
  • 12 hours of daylight per day in September in Sioux City12
    12 hours of daylight per day
  • No heat & humidity in September in Sioux City0
    No heat & humidity
  • 73 mm monthly rainfall in September in Sioux City73
    73 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Sioux City6
    6 (High) UV index
  • Top deals & discounts
  • Sioux City weather overview
  • Sioux City climate averages by month
  • More destinations
  • Best time to go to Sioux City
  • Sioux City 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The September weather guide for Sioux City, Iowa shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

  • Book car hire with Alamo & get Viator discount code
  • Save 10% on US attractions & excursions with Viator
  • Offer available to UK residents only

How hot is it in Sioux City in September?

Daytime temperatures usually reach 24°C in Sioux City in September, falling to 11°C at night.

How sunny is it in Sioux City in September?

There are normally 8 hours of bright sunshine each day in Sioux City in September - that's 63% of daylight hours.

Does it rain in Sioux City in September?

There are usually 9 days with some rain in Sioux City in September and the average monthly rainfall is 73mm.

Sioux City sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Sioux City in September 2020. Select a month to view Sioux City sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2020 06:51 19:59
Tuesday, 15th September 2020 07:06 19:34
Wednesday, 30th September 2020 07:22 19:08
  • Save 20% on hotels with Booking.com breakaway deals
  • Book hotels in Dubai, Bangkok, Paris & more
  • Travel between 1st Apr & 31st May 2020 (inclusive)

Expires at 23:59 on Sunday 31st May 2020 · View all Booking.com offers

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about the USA

Where's hot in Iowa in September?

Below are average maximum temperatures at popular destinations in Iowa in September. Select a destination to see more weather parameters.

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.