May weather forecast
Sierra Vista, AZ

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The vast Sierra Vista region of Arizona
The vast Sierra Vista region of Arizona

Weather in May

The transition from April to May in Sierra Vista is characterized by a considerable uptick in temperatures. The city gets significantly warmer with the average high temperature reaching 80.1°F (26.7°C), a clear indication of the impending summer. Bright and sunny days, coupled with the warming atmosphere, make it ideal for basking in the sun or dipping in the pool. Minimal rainfalls and a decrease in cloud cover allow uninterrupted enjoyment of the outdoors. Clear skies and extended daylight hours add to the city's charm during this period.

Temperature

As May begins, there's a slight increase in the average high-temperature, moving from an agreeable 73.2°F (22.9°C) in April to a moderately hot 80.1°F (26.7°C). In May, the temperature sees a substantial plunge from daytime highs to a low average of 54.1°F (12.3°C).

Humidity

May and June, with an average relative humidity of 23%, are the least humid months.

Rainfall

May is the month with the least rainfall in Sierra Vista. Rain falls for 2.3 days and accumulates 0.12" (3mm) of precipitation.

Snowfall

In Sierra Vista, snow does not fall in April through November.

Daylight

In May, the average length of the day in Sierra Vista is 13h and 47min.
On the first day of May, sunrise is at 5:34 am and sunset at 7:01 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 7:21 pm MST.

Sunshine

In Sierra Vista, the average sunshine in May is 11.9h.

UV index

In May, the average daily maximum UV index in Sierra Vista, Arizona, is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the maximum UV index of 6 suggests these recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

What are the temperatures in Sierra Vista in May?

An average high-temperature, in May, in Sierra Vista, is 80.1°F (26.7°C) and the average low-temperature is 54.1°F (12.3°C).

What is the least humid month in Sierra Vista?

The months with the lowest humidity are May and June, with an average relative humidity of 23%.

What is the average humidity in May in Sierra Vista?

In Sierra Vista, the average relative humidity in May is 23%.

What is the driest month in Sierra Vista?

May is the month with the least rainfall in Sierra Vista. Rain falls for 2.3 days and accumulates 0.12" (3mm) of precipitation.

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

In Sierra Vista, Arizona, in May, during 2.3 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When it does not snow in Sierra Vista?

In Sierra Vista, snow does not fall in April through November.

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

In May, the average day length in Sierra Vista is 13h and 47min.

What time are sunrise and sunset in May in Sierra Vista?

In May, on the first day of the month, sunrise is at 5:34 am and sunset at 7:01 pm. On the last day of the month, in Sierra Vista, Arizona, sunrise is at 5:16 am and sunset at 7:21 pm MST.

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

The average sunshine duration in May in Sierra Vista is 11.9h.

How high is the UV index in May in Sierra Vista?

The average daily maximum UV index in May in Sierra Vista, Arizona, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Sierra Vista, AZ

Average temperature in May - Sierra Vista, AZ
  • Average high temperature in May: 80.1°F

The warmest month (with the highest average high temperature) is June (90.1°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in May: 54.1°F

The month with the highest average low temperature is July (69.6°F).
The coldest months (with the lowest average low temperature) are January and December (37.8°F).

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Average pressure in May
Sierra Vista, AZ

Average pressure in May - Sierra Vista, AZ
  • Average pressure in May: 29.87"Hg

The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in May
Sierra Vista, AZ

Average wind speed in May - Sierra Vista, AZ
  • Average wind speed in May: 9.6mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in May
Sierra Vista, AZ

Average humidity in May - Sierra Vista, AZ
  • Average humidity in May: 23%

The month with the highest relative humidity is September (50%).
The months with the lowest relative humidity are May and June (23%).

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Average rainfall in May
Sierra Vista, AZ

Average rainfall in May - Sierra Vista, AZ
  • Average rainfall in May: 0.12"

The wettest month (with the highest rainfall) is July (4.53").
The driest month (with the least rainfall) is May (0.12").

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Average rainfall days in May
Sierra Vista, AZ

Average rainfall days in May - Sierra Vista, AZ
  • Average rainfall days in May: 2.3 days

The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is May (2.3 days).

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Average snowfall in May
Sierra Vista, AZ

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

The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Sierra Vista, AZ

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

The month with the highest number of snowfall days is December (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Sierra Vista, AZ

Average daylight in May / Average sunshine in May - Sierra Vista, AZ
  • Average daylight in May: 13h and 5min

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: 11h and 5min

The months with the most sunshine are June and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

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Average sunshine days in May
Sierra Vista, AZ

Average sunshine days in May - Sierra Vista, AZ
  • Average sunshine days in May: 28.1 days

The month with the most sunshine days is May (28.1 days).
The month with the least sunshine days is July (6.5 days).

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Average UV index in May
Sierra Vista, AZ

Average UV index in May - Sierra Vista, AZ
  • Average UV index in May: 6

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in May
Sierra Vista, AZ

Average cloud cover in May - Sierra Vista, AZ
  • Average cloud cover in May: 8

The month with the most cloud cover is July (Cloud cover 24).
The month with the least cloud cover is May (Cloud cover 8).

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Average visibility in May
Sierra Vista, AZ

Average visibility in May - Sierra Vista, 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).

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Sierra Vista, Arizona, USA

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