Grand Canyon weather in September 2025

Expect daytime maximum temperatures of 28°C in Grand Canyon, Arizona in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in September in Grand Canyon28
    28°C max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in September in Grand Canyon5
    5 days with some rainfall
  • 10°C minimum night-time temperature in September in Grand Canyon10
    10°C min night temperature
  • 12 hours of daylight per day in September in Grand Canyon12
    12 hours of daylight per day
  • No heat & humidity in September in Grand Canyon0
    No heat & humidity
  • 24 mm monthly rainfall in September in Grand Canyon24
    24 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Grand Canyon8
    8 (Very High) UV index

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The September weather guide for Arizona (Grand Canyon) 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 Arizona

How hot is it in Grand Canyon in September?

Daytime temperatures usually reach 28°C in Grand Canyon in September with no heat and humidity, falling to 10°C at night.

How sunny is it in Grand Canyon in September?

There are normally 10 hours of bright sunshine each day in Grand Canyon in September - that's 82% of daylight hours.

Does it rain in Grand Canyon in September?

There are usually 5 days with some rain in Grand Canyon in September and the average monthly rainfall is 24mm.

Grand Canyon September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:01 18:56
Monday, 15th September 2025 06:11 18:35
Tuesday, 30th September 2025 06:23 18:13

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