August 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 August

Moving into August, Sierra Vista maintains its tendency for rainy summers. While temperatures remain high, similar to July around 86.5°F (30.3°C), it is the average rainfall of 4.06" (103mm) that sets August apart. Sierra Vista continues to experience regular rain showers, providing much-needed relief from the higher temperatures. The charm of monsoonal summer days continuing from July creates a spectacle of lush landscapes and unique wildlife sightings.

Temperature

The introduction of August brings an average high temperature of a still tropical 86.5°F (30.3°C), mirroring the readings of the previous month. Sierra Vista sees an average low-temperature of 68.2°F (20.1°C) during August.

Heat index

August's mean heat index is estimated at a hot 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

In August, the average relative humidity is 49%.

Rainfall

In Sierra Vista, during August, the rain falls for 18.7 days and regularly aggregates up to 4.06" (103mm) of precipitation. In Sierra Vista, during the entire year, the rain falls for 92.2 days and collects up to 15.47" (393mm) of precipitation.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 16min.
On the first day of August, sunrise is at 5:37 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 6:45 pm MST.

Sunshine

June and August, with an average of 12h of sunshine, are months with the most sunshine.

UV index

In Sierra Vista, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: In August, an average UV index of 6 transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

The average high-temperature and low-temperature during August are 86.5°F (30.3°C) and 68.2°F (20.1°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 87.8°F (31°C).

What is the average humidity in August?

The average relative humidity in August is 49%.

How much does it rain in August?

In Sierra Vista, in August, during 18.7 rainfall days, 4.06" (103mm) of precipitation is typically accumulated.

When it does not snow?

April through November are months without snowfall.

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

The average day length in August is 13h and 16min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:37 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 6:45 pm MST.

What are the months with the most sunshine?

The months with the most sunshine are June and August, with an average of 12h of sunshine.

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

The average sunshine duration in August is 12h.

How high is the UV index in August?

The average daily maximum UV index in August in Sierra Vista is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
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 August
Sierra Vista, AZ

Average temperature in August - Sierra Vista, AZ
  • Average high temperature in August: 86.5°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 August: 68.2°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).

Average pressure in August
Sierra Vista, AZ

Average pressure in August - Sierra Vista, AZ
  • Average pressure in August: 29.9"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).

Average wind speed in August
Sierra Vista, AZ

Average wind speed in August - Sierra Vista, AZ
  • Average wind speed in August: 5.5mph

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).

Average humidity in August
Sierra Vista, AZ

Average humidity in August - Sierra Vista, AZ
  • Average humidity in August: 49%

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

Average rainfall in August
Sierra Vista, AZ

Average rainfall in August - Sierra Vista, AZ
  • Average rainfall in August: 4.06"

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

Average rainfall days in August
Sierra Vista, AZ

Average rainfall days in August - Sierra Vista, AZ
  • Average rainfall days in August: 18.7 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).

Average snowfall in August
Sierra Vista, AZ

Average snowfall in August - Sierra Vista, AZ
  • Average snowfall in August: 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").

Average snowfall days in August
Sierra Vista, AZ

Average snowfall days in August - Sierra Vista, AZ
  • Average snowfall days in August: 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).

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

Average daylight in August / Average sunshine in August - Sierra Vista, AZ
  • Average daylight in August: 13h and 2min

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 August: 12h and 0min

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).

Average sunshine days in August
Sierra Vista, AZ

Average sunshine days in August - Sierra Vista, AZ
  • Average sunshine days in August: 7.7 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).

Average UV index in August
Sierra Vista, AZ

Average UV index in August - Sierra Vista, AZ
  • Average UV index in August: 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).

Average cloud cover in August
Sierra Vista, AZ

Average cloud cover in August - Sierra Vista, AZ
  • Average cloud cover in August: 19

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

Average visibility in August
Sierra Vista, AZ

Average visibility in August - Sierra Vista, AZ
  • Average visibility in August: 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).

Sierra Vista, Arizona, USA

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