May 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 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).

Temperature

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). In May, in Flagstaff, the average low-temperature is 43.5°F (6.4°C).

Humidity

In May, the average relative humidity is 33%.

Rainfall

In Flagstaff, during 4.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, there are 74.8 rainfall days, and 12.56" (319mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Flagstaff are January through May, October through December. May is the last month it regularly snows. During 0.9 snowfall days, in May, Flagstaff aggregates 0.47" (12mm) of snow. In Flagstaff, during the entire year, snow falls for 30.6 days, and aggregates up to 28.66" (728mm) of snow.

Daylight

The average length of the day in Flagstaff is 14h.

Sunshine

In Flagstaff, the average sunshine is 11.7h.

UV index

The average daily maximum UV index in Flagstaff, Arizona, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the temperature in May in Flagstaff?

In May, in Flagstaff, Arizona, the average high-temperature is 68.9°F (20.5°C), and the average low-temperature is 43.5°F (6.4°C).

What is the average humidity in May in Flagstaff?

In Flagstaff, the average relative humidity in May is 33%.

How much does it rain in Flagstaff in May?

In Flagstaff, Arizona, in May, it is raining for 4.8 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the last month it snows in Flagstaff?

May is the last month it regularly snows in Flagstaff. During 0.9 snowfall days, in May, Flagstaff aggregates 0.47" (12mm) of snow.

What is the average length of the day in May in Flagstaff?

In Flagstaff, Arizona, the average length of the day in May is 14h.

How long on average sun shines in May in Flagstaff?

In Flagstaff, Arizona, the average sunshine in May is 11.7h.

What is the UV index reading in May in Flagstaff?

The average daily maximum UV index in May in Flagstaff is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in May
Flagstaff, AZ

Average temperature in May - Flagstaff, AZ
  • Average high temperature in May: 68.9°F

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).

  • Average low temperature in May: 43.5°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 in May
Flagstaff, AZ

Average pressure in May - Flagstaff, AZ
  • Average pressure in May: 29.88"

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 in May
Flagstaff, AZ

Average wind speed in May - Flagstaff, AZ
  • Average wind speed in May: 9.4mph

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 humidity in May
Flagstaff, AZ

Average humidity in May - Flagstaff, AZ
  • Average humidity in May: 33%

The month with the highest relative humidity is January (66%).
The month with the lowest relative humidity is June (24%).

[Resources]

Average rainfall in May
Flagstaff, AZ

Average rainfall in May - Flagstaff, AZ
  • Average rainfall in May: 0.75"

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 in May
Flagstaff, AZ

Average rainfall days in May - Flagstaff, AZ
  • Average rainfall days in May: 4.8 days

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 in May
Flagstaff, AZ

Average snowfall in May - Flagstaff, AZ
  • Average snowfall in May: 0.47"

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 in May
Flagstaff, AZ

Average snowfall days in May - Flagstaff, AZ
  • Average snowfall days in May: 0.9 days

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 in May /
Average sunshine in May
Flagstaff, AZ

Average daylight in May / Average sunshine in May - Flagstaff, AZ
  • Average daylight in May: 14h

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

  • Average sunshine in May: 11.7h

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 in May
Flagstaff, AZ

Average sunshine days in May - Flagstaff, AZ
  • Average sunshine days in May: 23.5 days

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 in May
Flagstaff, AZ

Average UV index in May - Flagstaff, AZ
  • Average UV index in May: 5

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 cloud cover in May
Flagstaff, AZ

Average cloud cover in May - Flagstaff, AZ
  • Average cloud cover in May: 12

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 7).

[Resources]

Average visibility in May
Flagstaff, AZ

Average visibility in May - Flagstaff, AZ
  • Average visibility in May: 6mi

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]