Monthly weather forecast and climate
Flagstaff, AZ

The brown iconic clock tower in the city of Flagstaff, Arizona, with the street signs of Birch Avenue and San Francisco Street
The brown iconic clock tower in the city of Flagstaff, Arizona, with the street signs of Birch Avenue and San Francisco Street

Weather in January

January, the same as December, is another cold winter month in Flagstaff, Arizona, with average temperature fluctuating between 25.2°F (-3.8°C) and 42.6°F (5.9°C). January and December, with an average high-temperature of 42.6°F (5.9°C), are the coldest months. Weather in January »

Weather in February

February, the last month of the winter, in Flagstaff, is a frosty month, with temperature in the range of an average low of 27.1°F (-2.7°C) and an average high of 45.5°F (7.5°C). In February, the average high-temperature is essentially the same as in January - a frosty 45.5°F (7.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Flagstaff, Arizona, with average temperature ranging between max 53.8°F (12.1°C) and min 32.7°F (0.4°C). In Flagstaff, the average high-temperature in March marginally rises, from a frosty 45.5°F (7.5°C) in February, to a fresh 53.8°F (12.1°C). Weather in March »

Weather in April

April in Flagstaff, Arizona, is a comfortable spring month, with average temperature varying between 37.2°F (2.9°C) and 61.3°F (16.3°C). In Flagstaff, the average high-temperature in April marginally rises, from a fresh 53.8°F (12.1°C) in March, to a comfortable 61.3°F (16.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Flagstaff, Arizona, with temperature in the range of an average low of 43.5°F (6.4°C) and an average high of 68.9°F (20.5°C). In May, the average high-temperature slightly increases, from a comfortable 61.3°F (16.3°C) in April, to an agreeable 68.9°F (20.5°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Flagstaff, Arizona, with average temperature fluctuating between 54.1°F (12.3°C) and 81.5°F (27.5°C). In Flagstaff, the average high-temperature rises, from a pleasant 68.9°F (20.5°C) in May, to a moderately hot 81.5°F (27.5°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Flagstaff, Arizona, with average temperature ranging between max 82.8°F (28.2°C) and min 60.4°F (15.8°C). July is the warmest month, with an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C). In July, the average heat index is calculated to 82.6°F (28.1°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Flagstaff, Arizona, with average temperature fluctuating between 59.7°F (15.4°C) and 81°F (27.2°C). In August, the average high-temperature is practically the same as in July - a still warm 81°F (27.2°C). Weather in August »

Weather in September

September, the first month of the autumn, in Flagstaff, is also a moderately hot month, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 75.2°F (24°C). In Flagstaff, the average high-temperature in September marginally drops, from 81°F (27.2°C) in August, to a still warm 75.2°F (24°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Flagstaff, Arizona, with average temperature fluctuating between 63.5°F (17.5°C) and 41.7°F (5.4°C). In Flagstaff, the average high-temperature in October drops, from a warm 75.2°F (24°C) in September, to an enjoyable 63.5°F (17.5°C). Weather in October »

Weather in November

November, the last month of the autumn, in Flagstaff, is another cool month, with average temperature varying between 53.1°F (11.7°C) and 32.2°F (0.1°C). In Flagstaff, the average high-temperature decreases, from a comfortable 63.5°F (17.5°C) in October, to a fresh 53.1°F (11.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Flagstaff, Arizona, with average temperature varying between 24.8°F (-4°C) and 42.6°F (5.9°C). January and December, with an average high-temperature of 42.6°F (5.9°C), are the coldest months. Weather in December »
[Resources]

FAQ

What is the coldest month in Flagstaff?

The coldest months in Flagstaff are January and December, with an average high-temperature of 42.6°F (5.9°C).

What is the most humid month in Flagstaff?

With an average relative humidity of 66%, January is the most humid month.

How many days does it rain in Flagstaff?

In Flagstaff, during the entire year, the rain falls for 74.8 days and collects up to 12.56" (319mm) of precipitation.

When does it snow in Flagstaff?

January through May, October through December are months with snowfall in Flagstaff.

How much does it snow in Flagstaff?

In Flagstaff, during the entire year, snow falls for 30.6 days, and aggregates up to 28.66" (728mm) of snow.

What are the months with the lowest UV index in Flagstaff?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the least humid month in Flagstaff?

The least humid month is June, with an average relative humidity of 24%.

What is the driest month in Flagstaff?

The month with the least rainfall is June when the rain falls for 3 days and typically collects 0.24" (6mm) of precipitation.

When it does not snow in Flagstaff?

In Flagstaff snow does not fall in June through September.

When are the longest days in Flagstaff?

The month with the longest days is June, with an average of 14.5h of daylight.

What are the months with the most sunshine in Flagstaff?

Months with the most sunshine are June and August, with an average of 12.2h of sunshine.

What are the months with the highest UV index in Flagstaff?

Months with the highest UV index in Flagstaff are June through August, with an average maximum UV index of 6.

What is the warmest month in Flagstaff?

The warmest month in Flagstaff, Arizona, is July, with an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C).

What is the rainiest month in Flagstaff?

The month with the most rainfall in Flagstaff is July when the rain falls for 16.2 days and typically aggregates up to 2.56" (65mm) of precipitation.

What is the snowiest month in Flagstaff?

The month with the most snowfall in Flagstaff is December when snow falls for 7.4 days and typically aggregates up to 7.36" (187mm) of snow.

What is the month with the shortest days in Flagstaff?

The month with the shortest days is December, with an average of 9.8h of daylight.

What is the month with the least sunshine in Flagstaff?

December has the least sunshine of the year, with an average of 6.8h of sunshine.

Average temperature
Flagstaff, AZ

Average temperature - Flagstaff, AZ

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (42.6°F).

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).

[Resources]

Average pressure
Flagstaff, AZ

Average pressure - Flagstaff, AZ

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.86").

[Resources]

Average wind speed
Flagstaff, AZ

Average wind speed - Flagstaff, AZ

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

[Resources]

Average rainfall
Flagstaff, AZ

Average rainfall - Flagstaff, AZ

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is June (0.24").

[Resources]

Average rainfall days
Flagstaff, AZ

Average rainfall days - Flagstaff, AZ

The month with the highest number of rainy days is July (16.2 days).
Months with the least rainy days are February and November (2.5 days).

[Resources]

Average snowfall
Flagstaff, AZ

Average snowfall - Flagstaff, AZ

The month with the highest snowfall is December (7.36").
Months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days
Flagstaff, AZ

Average snowfall days - Flagstaff, AZ

The month with the highest number of snowfall days is December (7.4 days).
Months with the least snowfall days are June, July and August (0 days).

[Resources]

Average daylight / Average sunshine
Flagstaff, AZ

Average daylight / Average sunshine - Flagstaff, AZ

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

Months with the most sunshine are June and August (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.8h).

[Resources]

Average sunshine days
Flagstaff, AZ

Average sunshine days - Flagstaff, AZ

The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is July (11.4 days).

[Resources]

Average UV index
Flagstaff, AZ

Average UV index - Flagstaff, AZ

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average visibility
Flagstaff, AZ

Average visibility - Flagstaff, AZ

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]