The temperatures in Flagstaff in August are comfortable with low of 16°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Flagstaff during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Flagstaff in August 2025.
If you’re planning to visit Flagstaff in the near future, we highly recommend that you review the 14 day weather forecast for Flagstaff before you arrive.
Temperatures
27° / 16°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
127
mm
Sun Hours
11.8
Hrs
