May weather forecast and climate
Tempe, AZ

The Tempe Town Lake of Tempe City, Arizona
The Tempe Town Lake of Tempe City, Arizona

Weather in May

May, the last month of the spring, in Tempe, is a hot month, with temperature in the range of an average high of 90.1°F (32.3°C) and an average low of 67.1°F (19.5°C).

Temperature

In Tempe, the average high-temperature in May slightly increases, from a moderately hot 82.6°F (28.1°C) in April, to a tropical 90.1°F (32.3°C). The average low-temperature, in May, is 67.1°F (19.5°C).

Humidity

The average relative humidity in Tempe, Arizona, is 19%.

Rainfall

In Tempe, in May, it is raining for 1.8 days, with typically 0.12" (3mm) of accumulated precipitation. In Tempe, Arizona, during the entire year, the rain falls for 57.7 days and collects up to 7.72" (196mm) of precipitation.

Daylight

In May, the average length of the day is 13.9h.

Sunshine

The average sunshine in May is 11.9h.

UV index

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 threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 8 in May transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Tempe?

The average high-temperature, in May, in Tempe, is 90.1°F (32.3°C), while the average low-temperature is 67.1°F (19.5°C).

What is the average humidity in May in Tempe?

The average relative humidity in May in Tempe, Arizona, is 19%.

How many days does it rain in May in Tempe?

In May, in Tempe, the rain falls for 1.8 days. Throughout May, 0.12" (3mm) of precipitation is accumulated.

How many hours of daylight does Tempe have in May?

The average length of the day in May in Tempe, Arizona, is 13.9h.

How long on average sun shines in May in Tempe?

The average sunshine in May in Tempe, Arizona, is 11.9h.

When is the highest UV index in Tempe?

Months with the highest UV index in Tempe, Arizona, are May through August, with an average maximum UV index of 8.

How high is the UV index in May in Tempe?

In Tempe, Arizona, the average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to the UV radiation.

Average temperature in May
Tempe, AZ

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).

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Average pressure in May
Tempe, AZ

Average pressure in May - Tempe, AZ
  • Average pressure in May: 29.84"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.81").

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Average wind speed in May
Tempe, AZ

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).

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Average humidity in May
Tempe, AZ

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%).

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Average rainfall in May
Tempe, AZ

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").

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Average rainfall days in May
Tempe, AZ

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).

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

Average daylight in May / Average sunshine in May - Tempe, AZ
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in May: 11.9h

Months with the most sunshine are June and August (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days in May
Tempe, AZ

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).

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Average UV index in May
Tempe, AZ

Average UV index in May - Tempe, AZ
  • Average UV index in May: 8

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).

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Average cloud cover in May
Tempe, AZ

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).

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Average visibility in May
Tempe, AZ

Average visibility in May - Tempe, AZ
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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