May weather forecast and climate
Sierra Vista, CA

Weather in May

May, the last month of the spring, in Sierra Vista, is another warm month, with average temperature ranging between min 55.4°F (13°C) and max 81.5°F (27.5°C).

Temperature

In May, the average high-temperature marginally rises, from a warm 73.4°F (23°C) in April, to a still moderately hot 81.5°F (27.5°C). In Sierra Vista, in May, the average low-temperature is 55.4°F (13°C).

Heat index

The average heat index is appraised at 81.7°F (27.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, differences in body mass, height, and shape, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Sierra Vista, California, is 46%.

Rainfall

In Sierra Vista, in May, during 3.3 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. Throughout the year, there are 51 rainfall days, and 7.56" (192mm) of precipitation is accumulated.

Daylight

In May, the average length of the day in Sierra Vista, California, is 14.2h.

Sunshine

In Sierra Vista, California, the average sunshine in May is 11.5h.

UV index

The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Sierra Vista?

The average high-temperature, in May, is 81.5°F (27.5°C), while the average low-temperature is 55.4°F (13°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in May is appraised at 81.7°F (27.6°C).

What is the average humidity in May in Sierra Vista?

In Sierra Vista, the average relative humidity in May is 46%.

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

In Sierra Vista, in May, it is raining for 3.3 days, with typically 0.47" (12mm) of accumulated precipitation.

What is the average length of the day in May in Sierra Vista?

In May, the average length of the day is 14.2h.

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

In Sierra Vista, the average sunshine in May is 11.5h.

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

In May, the average daily maximum UV index in Sierra Vista is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.

Average temperature in May
Sierra Vista, CA

Average temperature in May - Sierra Vista, CA
  • Average high temperature in May: 81.5°F

The warmest month (with the highest average high temperature) is July (100°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in May: 55.4°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure in May
Sierra Vista, CA

Average pressure in May - Sierra Vista, CA
  • Average pressure in May: 29.95"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in May
Sierra Vista, CA

Average wind speed in May - Sierra Vista, CA
  • Average wind speed in May: 7.3mph

The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity in May
Sierra Vista, CA

Average humidity in May - Sierra Vista, CA
  • Average humidity in May: 46%

The month with the highest relative humidity is January (68%).
The month with the lowest relative humidity is July (31%).

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Average rainfall in May
Sierra Vista, CA

Average rainfall in May - Sierra Vista, CA
  • Average rainfall in May: 0.47"

The wettest month (with the highest rainfall) is March (1.46").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in May
Sierra Vista, CA

Average rainfall days in May - Sierra Vista, CA
  • Average rainfall days in May: 3.3 days

The month with the highest number of rainy days is March (8.6 days).
The month with the least rainy days is June (0.8 days).

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

Average daylight in May / Average sunshine in May - Sierra Vista, CA
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in May: 11.5h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.2h).

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Average sunshine days in May
Sierra Vista, CA

Average sunshine days in May - Sierra Vista, CA
  • Average sunshine days in May: 27 days

The month with the most sunshine days is June (28.8 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in May
Sierra Vista, CA

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

Months with the highest UV index are June, July and August (UV index 7).
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, CA

Average cloud cover in May - Sierra Vista, CA
  • Average cloud cover in May: 16

Months with the most cloud cover are March and December (Cloud cover 30).
Months with the least cloud cover are July, August and September (Cloud cover 5).

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Average visibility in May
Sierra Vista, CA

Average visibility in May - Sierra Vista, CA
  • 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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