May weather forecastFlagstaff, AZ
May
Weather in May
May in Flagstaff is characterized by further precipitation decrease, with an average of just 0.75" (19mm). As temperatures rise, the city enters a phase of dry, warm weather. Coupled with a drop in the relative humidity, this makes for some comfortable evenings and clear skies. Sunshine hours register an increase, resulting in longer days. The month of May denotes the beginning of the summer season, a period of pleasant weather and clear skies.Temperature
The arrival of May witnesses a small shift in the average high-temperature, moving from a comfortable 61.3°F (16.3°C) in April to a pleasant 68.9°F (20.5°C). Flagstaff documents a striking divergence from daytime highs, with an average nighttime temperature of 43.5°F (6.4°C) in May.Humidity
The average relative humidity in May is 33%.Rainfall
In Flagstaff, in May, during 4.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Flagstaff, during the entire year, the rain falls for 74.8 days and collects up to 12.56" (319mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Flagstaff. 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
In Flagstaff, the average length of the day in May is 14h and 2min.On the first day of the month, sunrise is at 5:34 am and sunset at 7:12 pm. On the last day of May, sunrise is at 5:13 am and sunset at 7:35 pm MST.
Sunshine
The average sunshine in May in Flagstaff, Arizona, is 11.7h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 5 in May transforms into this advice:
Adopt protective measures - It is advised to guard against sun damage. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
The 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).
Average pressure in May
Flagstaff, AZ
- Average pressure in May: 29.88"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
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).
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%).
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").
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).
The months with the least rainy days are February and November (2.5 days).
Average snowfall in May
Flagstaff, AZ
- Average snowfall in May: 0.47"
The month with the highest snowfall is December (7.36").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Flagstaff, AZ
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in May: 11h and 42min
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).
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).
Average UV index in May
Flagstaff, AZ
- Average UV index in May: 5
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).
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).
Average visibility in May
Flagstaff, AZ
- Average visibility in May: 6mi
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).
