Sierra Vista
Arizona, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Sierra Vista, AZ

The vast Sierra Vista region of Arizona, and a view of a local church and distant mountain ranges
The vast Sierra Vista region of Arizona, and a view of a local church and distant mountain ranges
The last month of the spring, May, is also a moderately hot month in Sierra Vista, Arizona, with average temperature fluctuating between 54.9°F (12.7°C) and 85.1°F (29.5°C).

Temperature

In May, the average high-temperature marginally rises, from 76.8°F (24.9°C) in April, to a still warm 85.1°F (29.5°C). The average low-temperature, in May, is 54.9°F (12.7°C).

Rainfall

May is the month with the least rainfall. Rain falls for 1 days and accumulates 0.1" (3mm) of precipitation.

Snowfall

In Sierra Vista, during the entire year, snow aggregates up to 0.8" (20.3mm).

Daylight

The average length of the day is 13.8h.

Sunshine

Months with the most sunshine in Sierra Vista, Arizona, are May and June, with an average of 12h of sunshine.

UV index

In May, the average daily maximum UV index is 11. A UV Index estimate of 11, and higher, represents an extreme threat to health from unsafe exposure to the UV radiation for ordinary individuals.
The daily maximum UV index of 11 in May interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the temperature in May in Sierra Vista?

The average high-temperature, in May, in Sierra Vista, is 85.1°F (29.5°C), while the average low-temperature is 54.9°F (12.7°C).

How many days does it rain in May in Sierra Vista?

In Sierra Vista, Arizona, in May, it is raining for 1 days, with typically 0.1" (3mm) of accumulated precipitation.

What is the driest month in Sierra Vista?

May is the month with the least rainfall in Sierra Vista, Arizona. Rain falls for 1 days and accumulates 0.1" (3mm) of precipitation.

How many hours of daylight does Sierra Vista have in May?

The average length of the day in May in Sierra Vista, Arizona, is 13.8h.

What is the month with the most sunshine in Sierra Vista?

Months with the most sunshine in Sierra Vista, Arizona, are May and June, with an average of 12h of sunshine.

How long on average sun shines in May in Sierra Vista?

In May, the average sunshine in Sierra Vista, Arizona, is 12h.

What is the UV index reading in May in Sierra Vista?

In Sierra Vista, the average daily maximum UV index in May is 11. A UV Index value of 11, and more, symbolizes an extreme health threat from unprotected exposure to the UV radiation.
Average temperature in May - Sierra Vista, AZ
  • Average high temperature in May: 85.1°F

The warmest month (with the highest average high temperature) is June (92.9°F).
The month with the lowest average high temperature is January (61.2°F).

  • Average low temperature in May: 54.9°F

The month with the highest average low temperature is July (66.3°F).
The coldest month (with the lowest average low temperature) is December (33.9°F).

Average rainfall in May - Sierra Vista, AZ
  • Average rainfall in May: 0.1"

The wettest month (with the highest rainfall) is July (3.8").
The driest month (with the lowest rainfall) is May (0.1").

Average rainfall days in May - Sierra Vista, AZ
  • Average rainfall days in May: 1 days

The month with the highest number of rainy days is August (12 days).
The month with the lowest number of rainy days is May (1 days).

Average snowfall in May - Sierra Vista, AZ
  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.3").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

Average daylight in May / Average sunshine in May - Sierra Vista, AZ
  • Average daylight in May: 13.8h

The month with the longest days is June (Average daylight: 14.2h).
The month with shortest days is December (Average daylight: 10.1h).

  • Average sunshine in May: 12h

Months with most sunshine are May and June (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 7h).

Average UV index in May - Sierra Vista, AZ
  • Average UV index in May: 11

The month with the highest UV index is July (UV index 12).
The month with the lowest UV index is December (UV index 3).