May weather forecastTempe, AZ
May
Weather in May
May introduces the residents of Tempe to the beginning of the summer heat with temperatures soaring up to 90.1°F (32.3°C). The cloud cover diminishes noticeably, and like April, May continues the trend of reduced rainfall with only 0.12" (3mm) falling throughout the month. An increased UV index urges for sun protection measures during daytime hours. Despite the rise in temperatures and decrease in cloud cover, wind speeds remain consistent with the previous month, providing some relief from the heat.Temperature
With the start of May, the average high-temperature marginally shifts from April's warm 82.6°F (28.1°C) to a tropical 90.1°F (32.3°C). During May, Tempe notes a substantial drop from the daytime peak to an average minimum temperature of 67.1°F (19.5°C).Humidity
The average relative humidity in May in Tempe is 19%.Rainfall
In Tempe, in May, it is raining for 1.8 days, with typically 0.12" (3mm) of accumulated precipitation. Throughout the year, there are 57.7 rainfall days, and 7.72" (196mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 13h and 54min.On the first day of the month, sunrise is at 5:38 am and sunset at 7:10 pm. On the last day of May, in Tempe, sunrise is at 5:18 am and sunset at 7:32 pm MST.
Sunshine
In Tempe, 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 of 8 to 10 symbolizes a very high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In May, a daily maximum UV index of 8 leads to the following instructions:
With the absence of protection, damage to skin and eyes can occur instantly. Ensure precautions are taken. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Tempe, AZ
- Average high temperature in May: 90.1°F
The warmest month (with the highest average high temperature) is July (102.6°F).
The month with the lowest average high temperature is December (62.8°F).
- Average low temperature in May: 67.1°F
The month with the highest average low temperature is August (84.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in May
Tempe, 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
Tempe, AZ
- Average wind speed in May: 6.3mph
The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).
Average humidity in May
Tempe, AZ
- Average humidity in May: 19%
The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (16%).
Average rainfall in May
Tempe, AZ
- Average rainfall in May: 0.12"
The wettest month (with the highest rainfall) is July (1.14").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in May
Tempe, AZ
- Average rainfall days in May: 1.8 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is June (1 days).
Average daylight in May /
Average sunshine in May
Tempe, 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 months with the most sunshine are June and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in May
Tempe, AZ
- Average sunshine days in May: 28.7 days
The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (16.8 days).
Average UV index in May
Tempe, 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
Tempe, 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
Tempe, 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).
