Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
With the onset of May, Phoenix's average high-temperature experiences a slight rise, moving from April's warm 83.1°F (28.4°C) to a hot 90.9°F (32.7°C). Phoenix's average low-temperature of 67.6°F (19.8°C) in May reflects a considerable decline from the daytime peak.Humidity
The average relative humidity in May is 19%.Rainfall
The months with the least rainfall in Phoenix are May and June Rain falls for 1.3 days and accumulates 0.08" (2mm) of rain.Snowfall
In Phoenix, snow does not fall in January through August, October through December.Daylight
The average length of the day in May is 13h and 55min.On the first day of May, sunrise is at 5:39 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 7:32 pm MST.
Sunshine
In Phoenix, the average sunshine in May is 11.9h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 8 during May leads to these instructions:
Stay protected; otherwise, skin and eyes can suffer rapid damage. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Phoenix in May?
What is the average humidity in May?
What is the driest month?
How much does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What are the months with the highest UV index?
How high is the UV index in May?
Average temperature in May
Phoenix, AZ
- Average high temperature in May: 90.9°F
The warmest month (with the highest average high temperature) is July (103.6°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in May: 67.6°F
The month with the highest average low temperature is August (84.7°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).
Average pressure in May
Phoenix, AZ
- Average pressure in May: 29.84"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in May
Phoenix, AZ
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).
Average humidity in May
Phoenix, AZ
- Average humidity in May: 19%
The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (16%).
Average rainfall in May
Phoenix, AZ
- Average rainfall in May: 0.08"
The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are May and June (0.08").
Average rainfall days in May
Phoenix, AZ
- Average rainfall days in May: 1.3 days
The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in May
Phoenix, AZ
- Average snowfall in May: 0"
The month with the highest snowfall is September (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0").
Average snowfall days in May
Phoenix, AZ
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Phoenix, AZ
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 11h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in May
Phoenix, AZ
- Average sunshine days in May: 29.2 days
The month with the most sunshine days is May (29.2 days).
The month with the least sunshine days is July (21.1 days).
Average UV index in May
Phoenix, AZ
- Average UV index in May: 8
The months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Phoenix, AZ
- Average cloud cover in May: 8
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in May
Phoenix, 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).
Phoenix, Arizona, USA
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