Dubuque weather in September 2026

Expect daytime maximum temperatures of 73°F in Dubuque, Iowa in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 4.1 inches of rainfall in the month.

  • 73°F maximum daytime temperature in September in Dubuque73
    73°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Dubuque9
    9 days with some rainfall
  • 52°F minimum night-time temperature in September in Dubuque52
    52°F 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
  • 4.1 inches monthly rainfall in September in Dubuque4.1
    4.1 inches 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)  |  Imperial (°F)

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How hot is it in Dubuque in September?

Daytime temperatures usually reach 75°F in Dubuque in September, falling to 54°F 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 64% 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 3.6 inches.

Dubuque September sunrise & sunset times

Browse the sunrise and sunset times for Dubuque in September 2026. Select a month to view Dubuque sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:28 18:37
Tuesday, 15th September 2026 05:43 18:12
Wednesday, 30th September 2026 05:59 17:46

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