Flagstaff weather in August 2025

Expect daytime maximum temperatures of 26°C in Flagstaff, Arizona in August based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 73 mm of rainfall in the month.

  • 26°C maximum daytime temperature in August in Flagstaff26
    26°C max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in August in Flagstaff9
    9 days with some rainfall
  • 7°C minimum night-time temperature in August in Flagstaff7
    7°C min night temperature
  • 13 hours of daylight per day in August in Flagstaff13
    13 hours of daylight per day
  • Low heat & humidity in August in FlagstaffL
    Low heat & humidity
  • 73 mm monthly rainfall in August in Flagstaff73
    73 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in August in Flagstaff11
    11 (Extreme) UV index

More about Flagstaff

Flagstaff by month

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

Recommended for Arizona

Marriott: Best price match gurantee for members

  • Join Marriott Bonvoy for the best rates on hotel stays
  • Exclusive membership perks & additional benefits
  • Includes discounts, upgrades & earn points free stays
Go to Marriott deal >>

View all Marriott offers

The August weather guide for Arizona (Flagstaff) 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)

Back to top

More about Arizona

How hot is it in Flagstaff in August?

Daytime temperatures usually reach 26°C in Flagstaff in August with low heat and humidity, falling to 7°C at night.

How sunny is it in Flagstaff in August?

There are normally 10 hours of bright sunshine each day in Flagstaff in August - that's 75% of daylight hours.

Does it rain in Flagstaff in August?

There are usually 9 days with some rain in Flagstaff in August and the average monthly rainfall is 73mm.

Flagstaff August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:36 19:29
Saturday, 16th August 2025 05:47 19:14
Sunday, 31st August 2025 05:59 18:54

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^