Dubuque weather in September 2025

Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Dubuque in September. Check more long-term weather averages for Dubuque in September before you book your next holiday to Iowa in 2025/2026.

  • 23°C maximum daytime temperature in September in Dubuque23
    23°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Dubuque9
    9 days with some rainfall
  • 11°C minimum night-time temperature in September in Dubuque11
    11°C min night temperature
  • 12 hours of daylight per day in September in Dubuque12
    12 hours of daylight per day
  • No heat & humidity in September in Dubuque0
    No heat & humidity
  • 105 mm monthly rainfall in September in Dubuque105
    105 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Dubuque6
    6 (High) UV index

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The September weather guide for Iowa (Dubuque) 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 / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Dubuque in September?

Daytime temperatures usually reach 23°C in Dubuque in September, falling to 11°C at night.

How sunny is it in Dubuque in September?

There are normally 8 hours of bright sunshine each day in Dubuque in September - that's 61% of daylight hours.

Does it rain in Dubuque in September?

There are usually 9 days with some rain in Dubuque in September and the average monthly rainfall is 105mm.

Dubuque September sunrise & sunset times

Browse the sunrise and sunset times for Dubuque in September 2025. Select a month to view Dubuque sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:28 18:36
Monday, 15th September 2025 05:43 18:12
Tuesday, 30th September 2025 05:59 17:45

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