Climate and monthly weather forecast
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 an average temperature ranging between min 25.2°F (-3.8°C) and max 42.6°F (5.9°C). The coldest months are January and December, with an average high-temperature of 42.6°F (5.9°C). Weather in January »

Weather in February

February, the last month of the winter in Flagstaff, is a chilly month, with an average temperature ranging between min 27.1°F (-2.7°C) and max 45.5°F (7.5°C). In Flagstaff, the average high-temperature in February is relatively the same as in January - a frosty 45.5°F (7.5°C). Weather in February »

Weather in March

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

Weather in April

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

Weather in May

May, the last month of the spring in Flagstaff, is a pleasant month, with an average temperature ranging between max 68.9°F (20.5°C) and min 43.5°F (6.4°C). In Flagstaff, the average high-temperature in May slightly increases from an enjoyable 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 moderately hot month in Flagstaff, Arizona, with temperature in the range of an average high of 81.5°F (27.5°C) and an average low of 54.1°F (12.3°C). In June, the average high-temperature increases from a pleasant 68.9°F (20.5°C) in May to a warm 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 an 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). The average heat index in July is evaluated at 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 temperature in the range of an average high of 81°F (27.2°C) and an average low of 59.7°F (15.4°C). In Flagstaff, the average high-temperature in August is practically the same as in July - a still warm 81°F (27.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Flagstaff, Arizona, with temperature in the range of an average high of 75.2°F (24°C) and an average low of 53.8°F (12.1°C). In September, the average high-temperature slightly decreases from a warm 81°F (27.2°C) in August to a still moderately hot 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 an average temperature fluctuating between 41.7°F (5.4°C) and 63.5°F (17.5°C). In Flagstaff, the average high-temperature in October drops from a moderately hot 75.2°F (24°C) in September to a comfortable 63.5°F (17.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Flagstaff, Arizona, with temperature in the range of an average high of 53.1°F (11.7°C) and an average low of 32.2°F (0.1°C). In Flagstaff, the average high-temperature in November drops from an enjoyable 63.5°F (17.5°C) in October to a cool 53.1°F (11.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Flagstaff, Arizona, with temperature in the range of an average high of 42.6°F (5.9°C) and an average low of 24.8°F (-4°C). The coldest months are January and December, with an average high-temperature of 42.6°F (5.9°C). Weather in December »
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FAQ

What are the coldest months in Flagstaff?

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

What is the most humid month in Flagstaff?

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

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?

Months with snowfall are January through May, October through December.

How many days 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.

When is the lowest UV index in Flagstaff?

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

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?

June is the month with the least rainfall. Rain falls for 3 days and accumulates 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?

With an average of 14h and 29min of daylight, June has the longest days of the year.

What are the months with the most sunshine in Flagstaff?

The 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?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month in Flagstaff?

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

What is the rainiest month in Flagstaff?

July is the month with the most rainfall. Rain falls for 16.2 days and accumulates 2.56" (65mm) of precipitation.

What is the snowiest month in Flagstaff?

The month with the most snowfall 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?

With an average of 9h and 50min of daylight, December has the shortest days of the year in Flagstaff.

Is there Daylight Saving Time (DST) in Flagstaff?

Flagstaff, Arizona, does not observe Daylight Saving Time (DST). MST timezone is used over the entire year.

What is the month with the least sunshine in Flagstaff?

With an average of 6.8h of sunshine, December has the least sunshine of the year in Flagstaff.

Average temperature
Flagstaff, AZ

Average temperature - Flagstaff, AZ

The warmest month (with the highest average high temperature) is July (82.8°F).
The 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).

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Average pressure
Flagstaff, AZ

Average pressure - Flagstaff, AZ

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

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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).

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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").

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Average rainfall days
Flagstaff, AZ

Average rainfall days - Flagstaff, AZ

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

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Average snowfall
Flagstaff, AZ

Average snowfall - Flagstaff, AZ

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

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Average snowfall days
Flagstaff, AZ

Average snowfall days - Flagstaff, AZ

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

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Average daylight / Average sunshine
Flagstaff, AZ

Average daylight / Average sunshine - Flagstaff, AZ

The month with the longest days is June (Average daylight: 14h and 29min).
The month with the shortest days is December (Average daylight: 9h and 50min).

The months with the most sunshine are June and August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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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).

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Average UV index
Flagstaff, AZ

Average UV index - Flagstaff, AZ

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

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Average visibility
Flagstaff, AZ

Average visibility - Flagstaff, AZ

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

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