Flagstaff weather in September 2021

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  • 23°C maximum daytime temperature in September in Flagstaff23
    23°C max day temperature
  • 10 hours of sunshine per day
  • 7 days with some rainfall in September in Flagstaff7
    7 days with some rainfall
  • 3°C minimum night-time temperature in September in Flagstaff3
    3°C min night temperature
  • 12 hours of daylight per day in September in Flagstaff12
    12 hours of daylight per day
  • No heat & humidity in September in Flagstaff0
    No heat & humidity
  • 49 mm monthly rainfall in September in Flagstaff49
    49 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Flagstaff9
    9 (Very High) UV index

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The September weather guide for Flagstaff, Arizona 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.

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How hot is it in Flagstaff in September?

Daytime temperatures usually reach 23°C in Flagstaff in September, falling to 3°C at night.

How sunny is it in Flagstaff in September?

There are normally 10 hours of bright sunshine each day in Flagstaff in September - that's 79% of daylight hours.

Does it rain in Flagstaff in September?

There are usually 7 days with some rain in Flagstaff in September and the average monthly rainfall is 49mm.

Flagstaff sunrise & sunset times for September 2021

Browse the sunrise & sunset times for Flagstaff in September 2021. Select a month to view Flagstaff sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Wednesday, 1st September 2021 05:59 18:53
Wednesday, 15th September 2021 06:10 18:33
Thursday, 30th September 2021 06:21 18:11
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Arizona in September for 2021/2022?

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

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