Flagstaff (AZ) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Flagstaff.
Climate overview of Flagstaff
Temperatures in Flagstaff, Arizona, United States of America, vary greatly throughout the year. July is the hottest month at 28°C (82°F), while December is the coldest at 6°C (43°F).
With around 513 mm (20 in) of annual rain/snowfall, the city has moderate precipitation levels. August is the wettest month and June the driest. It also has two distinct dry seasons, February to June and October to November, with warm summers and cold winters.
Flagstaff Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Flagstaff - and find the best time to visit.
Monthly Temperature in Flagstaff
The climate in Flagstaff is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in July to a chilly 6°C (43°F) in the coolest month, December.
Nights vary from 12°C (54°F) in July to around -9°C (16°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Flagstaff
Generally, Flagstaff receives mid-range precipitation levels, with 513 mm (20 in) annually. The climate in Flagstaff shows significant variation throughout the year. Expect moderate rainfall in August, the wettest month, with an average of 95 mm (3.7 in) of precipitation over 17 rainy days.
In contrast, the driest month June offers drier and sunnier days, with around 8.6 mm (0.3 in) of rainfall over 3 rainy days. For more details, please visit our Flagstaff Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Flagstaff
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: June and July
- Fewer rainy days: March, April, May, June and November
- Seasonal pattern: Two distinct dry seasons, February to June and October to November, with warm summers and cold winters
- Coldest conditions: December, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Flagstaff
What is the best time to visit Flagstaff?
May, June, July, August and September typically offer the most optimal weather in Flagstaff. In contrast, January, February and December tend to have less optimal conditions. Flagstaff has two distinct dry seasons, February to June and October to November, with warm summers and cold winters.
What temperatures can I expect in Flagstaff?
Daytime highs range from 6°C (43°F) in December to 28°C (82°F) in July. Nighttime lows range from -9°C (16°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Flagstaff get?
Annual rainfall is around 513 mm (20 in). August is the wettest month with 95 mm (3.7 in), while June is the driest with 8.6 mm (0.3 in).
Flagstaff 3-Day Forecast
Flagstaff (AZ) 3-Day Forecast
Flagstaff on the map
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