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Arizona - National parks

Flagstaff weather and climate in 2025

Arizona - National parks

Flagstaff weather and climate in 2025

 

Day

26 °C

 

Night

11 °C

 

Precipitation

77 mm

in month

 

Rainy days

11 days

in month

 

Daylight

13 hours

average

 

Sunshine

10 hours

average

 

Humidity

56 %

 

Day

26 °C

 

Night

11 °C

 

Precipitation

77 mm

in month

 

Rainy days

11 days

in month

 

Daylight

13 hours

average

 

Sunshine

10 hours

average

 

Humidity

56 %

Overview: Flagstaff
Located in the United States of America, Flagstaff boasts a mild continental climate that presents a diverse range of weather patterns throughout the year. Daytime temperatures fluctuate from a cool 6 °C (42 °F) in the chilly month of December to a warm 28 °C (82 °F) during the peak of summer in July. At night, you can experience the coldest temperatures in December with a sharp drop to -8 °C (17 °F), while July offers the most comforting night temperatures at 11 °C (52 °F). As the seasons turn, precipitation varies significantly, with June being notably dry, averaging only 3 days of rainfall, whereas August stands out as the wettest month with as much as 11 days of rain. The diverse climate means visitors can enjoy sun-filled days, with sunlight duration ranging significantly across the months, from just under 7 hours in December to more than 12 hours in January. Each month presents its own unique set of weather conditions, inviting a closer look at the detailed forecasts for optimized travel planning.

Weather charts for Flagstaff

Weather overview
Weather overview
Weather overview
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Activities in Flagstaff

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Mountains
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Aerial view of mountain range in Flagstaff in sunny weather with few clouds

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Weather overview for Flagstaff

Weather overview

Located in the United States of America, Flagstaff boasts a mild continental climate that presents a diverse range of weather patterns throughout the year. Daytime temperatures fluctuate from a cool 6 °C (42 °F) in the chilly month of December to a warm 28 °C (82 °F) during the peak of summer in July. At night, you can experience the coldest temperatures in December with a sharp drop to -8 °C (17 °F), while July offers the most comforting night temperatures at 11 °C (52 °F). As the seasons turn, precipitation varies significantly, with June being notably dry, averaging only 3 days of rainfall, whereas August stands out as the wettest month with as much as 11 days of rain. The diverse climate means visitors can enjoy sun-filled days, with sunlight duration ranging significantly across the months, from just under 7 hours in December to more than 12 hours in January. Each month presents its own unique set of weather conditions, inviting a closer look at the detailed forecasts for optimized travel planning.

January weather

Sun hours in Flagstaff begin to increase as we enter the new year. Humidity peaks at 62 %, and the rainfall volume also climbs, reaching 52 mm (2.06 in).

February weather

Flagstaff experiences a climb in both day and night temperatures in February. The jump in the number of rainy days starts, reaching 7 days. The sun hours also see a rise compared to the previous month, now averaging 8 hours.

March weather

As spring approaches, both day and night temperatures continue their upward trend in Flagstaff. March also sees a continued increase in sun hours, now tallying 9 hours.

April weather

April marks the onset of Flagstaff's tourist season as temperatures keep rising. Rainfall starts to decrease with 28 mm (1.11 in), and the number of rainy days begins to reduce to 4 days. The wind speed hits its peak at 4 m/s.

May weather

Tourist activities continue through May in Flagstaff as daylight increases and rainfall further decreases to 17 mm (0.66 in). Daytime temperatures warm up to 20 °C (69 °F), with nights becoming milder at 3 °C (37 °F).

June weather

June in Flagstaff sees a continuation of warming trends with daytime temperatures reaching 26 °C (79 °F). Nighttime temperatures also rise to 7 °C (44 °F). The rainfall hits a yearly minimum with only 3 days of downpour, and sun hours peak at 12 hours.

July weather

Flagstaff reaches its highest temperatures in July with daytime readings soaring to 28 °C (82 °F) and nighttime temperatures at a comfortable 11 °C (52 °F). Rainy days begin to increase with an average of 10 days, and rainfall volume also swells to 67 mm (2.64 in).

August weather

Flagstaff experiences a turning point in August as day temperatures start to cool off to 26 °C (80 °F). Rainy days reach their maximum with 11 days, and rain volume is also at its yearly high.

September weather

With the tourist season still in full swing, September in Flagstaff sees a continued drop in temperatures. Rainfall amount begins to taper off with 51 mm (2.00 in), and the number of rainy days starts to decline as well.

October weather

Flagstaff enters into a drier season in October as rainfall starts to lessen considerably, averaging 36 mm (1.40 in). The day temperature also shows a decline.

November weather

The trend towards cooler weather continues in November in Flagstaff. Rainy days remain relatively scarce, and the day length diminishes.

December weather

Flagstaff's temperatures reach their minimum in December, while the number of rainy days and the quantity of rainfall start to rise once again.

FAQs

How many hours of sunshine does Flagstaff enjoy in January?

Flagstaff basks in an average of 7 hours of sunshine each day in January.

What changes are seen in Flagstaff's weather in February?

February in Flagstaff sees increases in day and night temperatures, a rise in rainy days to 7 days, and more sunlit hours, averaging 8 hours.

What is the average daily wind speed in Flagstaff during March?

In March, Flagstaff's average daily wind speed is about 4 m/s.

What's the expected duration of sunshine per day in April in Flagstaff?

Expect an average of 11 hours of daily sunshine in April in Flagstaff.

How does the weather change in May in Flagstaff?

May in Flagstaff brings longer daylight hours, warmer 20 °C (69 °F) daytime temperatures, and a decrease in rainfall to 17 mm (0.66 in).

Is Flagstaff excessively hot in June?

No, June in Flagstaff is comfortably warm, with average temperatures of 26 °C (79 °F) during the day.

Is July in Flagstaff a time of low precipitation?

Contrary to being dry, July in Flagstaff features increasing precipitation, averaging 10 days of rain.

What is the trend for Flagstaff's weather in August?

In August, Flagstaff begins to cool down, but rainy days hit their peak at 11 days and deliver their highest monthly rain totals.

How does Flagstaff's night temperature behave in September?

In September, Flagstaff's night temperature cools to an average of 6 °C (44 °F), ensuring cooler evenings.

What can be expected weather-wise in October in Flagstaff?

Expect a drier climate with decreased rainfall averaging 36 mm (1.40 in) and cooling day temperatures in October in Flagstaff.

Is November a suitable month to visit Flagstaff?

November is quite appropriate for a visit to Flagstaff, featuring sparse rainy days and mild day temperatures of 11 °C (52 °F) for various activities.

What is the sun hour average in Flagstaff during December?

In December, Flagstaff experiences the least sunlight with an average of 7 hours per day.

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