August weather forecast and climate
Portal, AZ

Weather in August

August, the last month of the summer, in Portal, is another hot month, with temperature in the range of an average low of 72°F (22.2°C) and an average high of 89.6°F (32°C).

Temperature

In Portal, the average high-temperature in August is relatively the same as in July - a still tropical 89.6°F (32°C). In Portal, the average low-temperature is 72°F (22.2°C).

Heat index

In August, the average heat index is appraised at a tropical 90.5°F (32.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, wind, pregnancy, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Portal is 41%.

Rainfall

In Portal, during 14.9 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Portal, during the entire year, the rain falls for 73.4 days and collects up to 7.91" (201mm) of precipitation.

Snowfall

In Portal snow does not fall in April through October.

Daylight

The average length of the day is 13.3h.

Sunshine

In Portal, Arizona, the average sunshine in August is 11.8h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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 August in Portal?

In August, in Portal, the average high-temperature is 89.6°F (32°C), and the average low-temperature is 72°F (22.2°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that combines both air temperature and relative humidity, in August is evaluated at 90.5°F (32.5°C).

What is the average humidity in August in Portal?

The average relative humidity in August in Portal, Arizona, is 41%.

How many days does it rain in August in Portal?

In Portal, during August, the rain falls for 14.9 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow in Portal?

April through October are months without snowfall in Portal.

What is the average length of the day in August in Portal?

In Portal, Arizona, the average length of the day in August is 13.3h.

How long on average sun shines in August in Portal?

The average sunshine in August is 11.8h.

What are the months with the highest UV index in Portal?

May through August, with an average maximum UV index of 7, are months with the highest UV index in Portal.

What is the UV index reading in August in Portal?

In Portal, Arizona, the average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.

Average temperature in August
Portal, AZ

Average temperature in August - Portal, AZ
  • Average high temperature in August: 89.6°F

The warmest month (with the highest average high temperature) is June (92.8°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in August: 72°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).

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Average pressure in August
Portal, AZ

Average pressure in August - Portal, AZ
  • Average pressure in August: 29.94"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in August
Portal, AZ

Average wind speed in August - Portal, AZ
  • Average wind speed in August: 7.4mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is January (7.1mph).

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Average humidity in August
Portal, AZ

Average humidity in August - Portal, AZ
  • Average humidity in August: 41%

The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is May (21%).

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Average rainfall in August
Portal, AZ

Average rainfall in August - Portal, AZ
  • Average rainfall in August: 1.46"

The wettest month (with the highest rainfall) is July (1.81").
The driest month (with the least rainfall) is April (0.12").

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Average rainfall days in August
Portal, AZ

Average rainfall days in August - Portal, AZ
  • Average rainfall days in August: 14.9 days

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is May (2.1 days).

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Average snowfall in August
Portal, AZ

Average snowfall in August - Portal, AZ
  • Average snowfall in August: 0"

The month with the highest snowfall is December (0.79").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
Portal, AZ

Average snowfall days in August - Portal, AZ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (1.5 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Portal, AZ

Average daylight in August / Average sunshine in August - Portal, AZ
  • Average daylight in August: 13.3h

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

  • Average sunshine in August: 11.8h

The month with the most sunshine is June (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in August
Portal, AZ

Average sunshine days in August - Portal, AZ
  • Average sunshine days in August: 11.3 days

The month with the most sunshine days is May (28.5 days).
The month with the least sunshine days is July (9.9 days).

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Average UV index in August
Portal, AZ

Average UV index in August - Portal, AZ
  • Average UV index in August: 7

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in August
Portal, AZ

Average cloud cover in August - Portal, AZ
  • Average cloud cover in August: 18

Months with the most cloud cover are July and December (Cloud cover 20).
The month with the least cloud cover is May (Cloud cover 8).

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Average visibility in August
Portal, AZ

Average visibility in August - Portal, AZ
  • Average visibility in August: 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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