Weather in September 2025

Flagstaff weather in September 2025

The temperatures in Flagstaff in September are comfortable with low of 13°C and and high up to 24°C.

You can expect about 3 to 8 days of rain in Flagstaff during the month of September. 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 September 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
Temperatures
24° / 13°
Rainy Days
Rainy Days
4
Snowy Days
Snowy Days
0
Dry Days
Dry Days
26
Rainfall
Rainfall
56
mm
11.9
Sun Hours
11.9
Hrs

Flagstaff annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 6° / -3° 3 20 8 49 mm
Awful
February 7° / -2° 2 19 7 47 mm
Bad
March 11° / 1° 2 23 6 43 mm
Bad
April 16° / 4° 2 25 3 22 mm
Ok
May 20° / 7° 3 27 1 24 mm
Good
June 27° / 13° 1 29 0 15 mm
Perfect
July 28° / 16° 9 22 0 178 mm
Good
August 27° / 16° 6 25 0 127 mm
Perfect
September 24° / 13° 4 26 0 56 mm
Perfect
October 18° / 6° 3 28 1 30 mm
Good
November 12° / 1° 2 25 4 36 mm
Bad
December 6° / -3° 3 19 9 57 mm
Awful
Temperatures in Flagstaff in September
Rain in Flagstaff in September

Recommended Hotels in Flagstaff

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Weather in Flagstaff in September - FAQ

What is the average temperature in Flagstaff in September?
The average temperature in Flagstaff in September is 13/24° C.
What is the chance of rain in Flagstaff in September?
On average, there are 4 rainy days in Flagstaff during September.
Weather wise, is September a good time to visit Flagstaff?
The weather in Flagstaff in September is perfect.
Can it snow in Flagstaff in September?
On average, there are 0 snowy days in Flagstaff in September.
More about the weather in Flagstaff