Sioux City weather in May 2026

Expect daytime maximum temperatures of 73°F in Sioux City, Iowa in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 3.7 inches of rainfall in the month.

  • 73°F maximum daytime temperature in May in Sioux City73
    73°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Sioux City11
    11 days with some rainfall
  • 50°F minimum night-time temperature in May in Sioux City50
    50°F min night temperature
  • 15 hours of daylight per day in May in Sioux City15
    15 hours of daylight per day
  • No heat & humidity in May in Sioux City0
    No heat & humidity
  • 3.7 inches monthly rainfall in May in Sioux City3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Sioux City7
    7 (High) UV index

More about Sioux City

Sioux City by month

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

Recommended for Iowa

KLM: Low fares on long haul from £358 return

  • Save on return flights to worldwide destinations
  • Book flights to Abu Dhabi, Jo'burg, Tokyo & more
  • Plus more flights to the Americas, Middle East & Europe
Go to KLM deal >>

View all KLM offers

The May weather guide for Iowa (Sioux City) 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.

Metric (°C)  |  Imperial (°F)

Back to top

More about the USA

How hot is it in Sioux City in May?

Daytime temperatures usually reach 73°F in Sioux City in May, falling to 50°F at night.

How sunny is it in Sioux City in May?

There are normally 9 hours of bright sunshine each day in Sioux City in May - that's 60% of daylight hours.

Does it rain in Sioux City in May?

There are usually 11 days with some rain in Sioux City in May and the average monthly rainfall is 3.7 inches.

Sioux City May sunrise & sunset times

Browse the sunrise and sunset times for Sioux City in May 2026. Select a month to view Sioux City sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:20 19:26
Saturday, 16th May 2026 05:03 19:42
Sunday, 31st May 2026 04:51 19:56

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^