May weather forecastGlendale, AZ

May
Weather in May
May sees the desert charm of Glendale in full swing, as the city shifts into its typically hot, dry summer mode. An appreciable surge in temperatures as compared to April aligns with the well-known Arizonian summer. Darkness is shirked off further with an expanded daylight duration stretching to 13.9 hours. Utilizing this abundant sunshine, after-dark activities remain feasible for night owls. With a continued reduction in cloud cover, stargazers find delight in unobstructed nightly celestial observations.Temperature
May signifies a subtle uplift in the average high-temperature, adjusting from a moderately hot 82°F (27.8°C) in April to a tropical 89.2°F (31.8°C). Glendale's average low-temperature of 66°F (18.9°C) in May reflects a significant disparity from the daytime highs.Humidity
In May, the average relative humidity is 19%.Rainfall
In May, in Glendale, Arizona, the rain falls for 2.3 days. Throughout May, 0.12" (3mm) of precipitation is accumulated. Throughout the year, in Glendale, there are 59.7 rainfall days, and 8.23" (209mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 13h and 55min.On the first day of May in Glendale, sunrise is at 5:39 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 7:33 pm MST.
Sunshine
In May, the average sunshine is 11.9h.UV index
The average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 7 during May morphs into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Glendale, AZ
- Average high temperature in May: 89.2°F
The warmest month (with the highest average high temperature) is July (101.8°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in May: 66°F
The month with the highest average low temperature is August (83.7°F).
The coldest month (with the lowest average low temperature) is December (46.8°F).
Average pressure in May
Glendale, 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 (29.8"Hg).
Average wind speed in May
Glendale, AZ
- Average wind speed in May: 6.6mph
The windiest months (with the highest average wind speed) are April and May (6.6mph).
The calmest month (with the lowest average wind speed) is December (4.6mph).
Average humidity in May
Glendale, 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 (17%).
Average rainfall in May
Glendale, AZ
- Average rainfall in May: 0.12"
The wettest month (with the highest rainfall) is August (1.18").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in May
Glendale, AZ
- Average rainfall days in May: 2.3 days
The month with the highest number of rainy days is July (10.7 days).
The month with the least rainy days is June (1.1 days).
Average daylight in May /
Average sunshine in May
Glendale, AZ
- Average daylight in May: 13h and 54min
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 54min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in May
Glendale, AZ
- Average sunshine days in May: 28.6 days
The month with the most sunshine days is May (28.6 days).
The month with the least sunshine days is August (15.9 days).
Average UV index in May
Glendale, AZ
- Average UV index in May: 7
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Glendale, 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
Glendale, 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).





