Flagstaff
Arizona, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Flagstaff, AZ

A close-up of the brown iconic clock tower in the city of Flagstaff, Arizona, with the street signs of Birch Avenue and San Francisco Street
A close-up of the brown iconic clock tower in the city of Flagstaff, Arizona, with the street signs of Birch Avenue and San Francisco Street
January, like December, in Flagstaff, Arizona, is a wintry winter month, with average temperature varying between 17.2°F (-8.2°C) and 42.4°F (5.8°C). January and December, with an average high-temperature of 42.4°F (5.8°C), are the coldest months. Weather in January »
The last month of the winter, February, is a chilly month in Flagstaff, Arizona, with average temperature fluctuating between 19.2°F (-7.1°C) and 44.8°F (7.1°C). In Flagstaff, the average high-temperature in February is relatively the same as in January - a chilly 44.8°F (7.1°C). Weather in February »

March, the first month of the spring, in Flagstaff, is a fresh month, with average temperature varying between 23.5°F (-4.7°C) and 50.4°F (10.2°C). In Flagstaff, the average high-temperature marginally rises, from a frosty 44.8°F (7.1°C) in February, to a fresh 50.4°F (10.2°C). Weather in March »

April in Flagstaff, Arizona, is a mild spring month, with average temperature ranging between max 58.3°F (14.6°C) and min 28.6°F (-1.9°C). In April, the average high-temperature marginally rises, from a cool 50.4°F (10.2°C) in March, to a moderate 58.3°F (14.6°C). Weather in April »

May, the last month of the spring, in Flagstaff, is a pleasant month, with average temperature ranging between max 68.2°F (20.1°C) and min 35.1°F (1.7°C). In May, the average high-temperature rises, from a moderate 58.3°F (14.6°C) in April, to an agreeable 68.2°F (20.1°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Flagstaff, Arizona, with average temperature varying between 77.9°F (25.5°C) and 41.9°F (5.5°C). In June, the average high-temperature rises, from a pleasant 68.2°F (20.1°C) in May, to a warm 77.9°F (25.5°C). Weather in June »

July, like June, in Flagstaff, Arizona, is a moderately hot summer month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 50.9°F (10.5°C). July is the warmest month, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 50.9°F (10.5°C). Weather in July »

August, the last month of the summer, in Flagstaff, is also a moderately hot month, with temperature in the range of an average low of 50.2°F (10.1°C) and an average high of 78.4°F (25.8°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.4°F (25.8°C). Weather in August »

September, the first month of the autumn, in Flagstaff, is also an agreeable month, with temperature in the range of an average low of 42.1°F (5.6°C) and an average high of 72.9°F (22.7°C). In Flagstaff, the average high-temperature marginally drops, from a moderately hot 78.4°F (25.8°C) in August, to a pleasant 72.9°F (22.7°C). Weather in September »

October, the same as September, is another comfortable autumn month in Flagstaff, Arizona, with temperature in the range of an average high of 62.1°F (16.7°C) and an average low of 31.5°F (-0.3°C). In Flagstaff, the average high-temperature decreases, from an agreeable 72.9°F (22.7°C) in September, to a comfortable 62.1°F (16.7°C). Weather in October »

November, the last month of the autumn, in Flagstaff, is another cool month, with average temperature varying between 22.8°F (-5.1°C) and 50.5°F (10.3°C). In Flagstaff, Arizona, the average high-temperature drops, from a comfortable 62.1°F (16.7°C) in October, to a cool 50.5°F (10.3°C). Weather in November »

The first month of the winter, December, is also a wintry month in Flagstaff, Arizona, with average temperature ranging between min 16.9°F (-8.4°C) and max 42.4°F (5.8°C). January and December, with an average high-temperature of 42.4°F (5.8°C), are the coldest months. Weather in December »

What is the coldest month in Flagstaff?

The coldest months in Flagstaff are January and December, with an average high-temperature of 42.4°F (5.8°C).

What is the most humid month in Flagstaff?

With an average relative humidity of 61.9%, January is the most humid month in Flagstaff, Arizona.

How much does it rain in Flagstaff?

In Flagstaff, Arizona, during the entire year, the rain falls for 87.7 days and collects up to 21.9" (555.3mm) of precipitation.

When does it snow in Flagstaff?

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

How much does it snow in Flagstaff?

In Flagstaff, during the entire year, snow falls for 34.9 days, and aggregates up to 101.7" (2583.3mm) of snow.

When does it snow the most in Flagstaff?

The month with the most snowfall in Flagstaff is January when snow falls for 7.5 days and typically aggregates up to 23.2" (589.3mm) of snow.

When is the lowest UV index in Flagstaff?

Months with the lowest UV index in Flagstaff are January and December, with an average maximum UV index of 3.

What is the least humid month in Flagstaff?

The least humid month in Flagstaff, Arizona, is June, with an average relative humidity of 33.6%.

What is the driest month in Flagstaff?

June is the month with the least rainfall. Rain falls for 2.6 days and accumulates 0.4" (9.1mm) of precipitation.

When are the longest days in Flagstaff?

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

What month has the most sunshine in Flagstaff?

The month with the most sunshine is June, with an average of 12.4h of sunshine.

What is the warmest month in Flagstaff?

With an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 50.9°F (10.5°C), July is the warmest month in Flagstaff.

What is the month with the highest UV index in Flagstaff?

July is the month with the highest UV index in Flagstaff, with an average maximum UV index of 12.

What is the rainiest month in Flagstaff?

The month with the most rainfall is August when the rain falls for 14 days and typically aggregates up to 3.1" (79mm) of precipitation.

What is the month with the shortest days in Flagstaff?

With an average of 9.8h of daylight, December has the shortest days of the year in Flagstaff, Arizona.

What is the month with the least sunshine in Flagstaff?

December has the least sunshine of the year, with an average of 7.1h of sunshine.
Average temperature - Flagstaff, AZ
Average humidity - Flagstaff, AZ

The month with the highest relative humidity is January (61.9%).
The month with the lowest relative humidity is June (33.6%).

Average rainfall - Flagstaff, AZ
Average rainfall days - Flagstaff, AZ

The month with the highest number of rainy days is August (14 days).
The month with the lowest number of rainy days is June (2.6 days).

Average snowfall - Flagstaff, AZ
Average snowfall days - Flagstaff, AZ

The month with the highest number of snowfall days is January (7.5 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Flagstaff, AZ

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

The month with most sunshine is June (Average sunshine: 12.4h).
The month with least sunshine is December (Average sunshine: 7.1h).