May weather forecastWhy, AZ

May

Weather in May

May, the last month of the spring in Why, is a hot month, with an average temperature ranging between max 90.5°F (32.5°C) and min 67.5°F (19.7°C).

Temperature

The shift into May is marked by a modest rise in the average high-temperature, moving from April's warm 83.1°F (28.4°C) to a hot 90.5°F (32.5°C). Why notes a substantial temperature decline from the daytime peaks throughout May, with an average nighttime temperature of 67.5°F (19.7°C).

Humidity

The average relative humidity in May is 20%.

Rainfall

The months with the least rainfall in Why, Arizona, are April through June Rain falls for 1.3 days and accumulates 0.08" (2mm) of rain.

Daylight

In May, the average length of the day is 13h and 49min.
On the first day of the month, sunrise is at 5:43 am and sunset at 7:12 pm. On the last day of May, sunrise is at 5:24 am and sunset at 7:32 pm MST.

Sunshine

The average sunshine in May in Why is 12h.

UV index

In Why, Arizona, the average daily maximum UV index in May is 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 7 during May translates into the following guidance:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During May, Why experiences an average high-temperature of 90.5°F (32.5°C) and a low-temperature of 67.5°F (19.7°C).

The average relative humidity in May in Why is 20%.

April through June are months with the least rain in Why when the rain falls for 1.3 days and typically aggregates up to 0.08" (2mm) of rain.

In May, in Why, the rain falls for 1.3 days. Throughout May, 0.08" (2mm) of precipitation is accumulated.

In May, the average day length is 13h and 49min.

In May, on the first day of the month, sunrise is at 5:43 am and sunset at 7:12 pm. On the last day of the month, in Why, Arizona, sunrise is at 5:24 am and sunset at 7:32 pm MST.

In May, the average sunshine duration in Why is 12h.

In May, the average daily maximum UV index in Why, Arizona, is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

83.1°F

90.5°F

101.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.1mph

9.4mph

9.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

27.7

29.2

27.1

Average UV index

Average cloud cover

10%

Average visibility

6mi

Average temperature in May
Why, AZ

Average high temperature in May: 90.5°F

The warmest month (with the highest average high temperature) is July (102.4°F).
The month with the lowest average high temperature is December (63.1°F).

Average low temperature in May: 67.5°F

The month with the highest average low temperature is August (85.3°F).
The coldest month (with the lowest average low temperature) is December (47.7°F).

Average pressure in May
Why, AZ

Average pressure in May: 29.81"Hg

The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.76"Hg).

Average wind speed in May
Why, AZ

Average wind speed in May: 8.3mph

The windiest months (with the highest average wind speed) are May and June (8.3mph).
The calmest months (with the lowest average wind speed) are January and December (5.3mph).

Average humidity in May
Why, AZ

Average humidity in May: 20%

The month with the highest relative humidity is December (42%).
The month with the lowest relative humidity is June (17%).

Average rainfall in May
Why, AZ

Average rainfall in May: 0.08"

The wettest month (with the highest rainfall) is July (1.5").
The driest months (with the least rainfall) are April, May and June (0.08").

Average rainfall days in May
Why, AZ

Average rainfall days in May: 1.3 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is May (1.3 days).

Average daylight in May /
Average sunshine in May
Why, AZ

Average daylight in May: 13h and 48min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

Average sunshine in May: 12h and 0min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

Average sunshine days in May
Why, 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 (13.4 days).

Average UV index in May
Why, 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
Why, AZ

Average cloud cover in May: 7

The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).

Average visibility in May
Why, 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).