August weather forecast
Phoenix, AZ

The city of Phoenix, Arizona at dusk
The city of Phoenix, Arizona at dusk

Weather in August

The last month of the summer, August, is another torrid month in Phoenix, Arizona, with an average temperature fluctuating between 102.6°F (39.2°C) and 84.7°F (29.3°C).

Temperature

In Phoenix, Arizona, the average high-temperature in August is practically the same as in July - a still sweltering 102.6°F (39.2°C). In August, in Phoenix, the average low-temperature is 84.7°F (29.3°C).

Humidity

In Phoenix, Arizona, the average relative humidity in August is 30%.

Rainfall

In August, the rain falls for 7.2 days. Throughout August, 0.59" (15mm) of precipitation is accumulated. Throughout the year, in Phoenix, there are 44.6 rainfall days, and 5.04" (128mm) of precipitation is accumulated.

Snowfall

In Phoenix, Arizona, snow does not fall in January through August, October through December.

Daylight

The average length of the day in August is 13h and 21min.
On the first day of August in Phoenix, sunrise is at 5:41 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 6:55 pm MST.

Sunshine

In August, the average sunshine is 12h.

UV index

The months with the highest UV index in Phoenix are May through August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 8 in August interpret into the following advice:
Take extra precautions. Protection against sun 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. A wide-brim hat offers excellent sun protection for the 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.
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FAQ

What is the average humidity in August in Phoenix?

The average relative humidity in August is 30%.

How many days does it rain in August in Phoenix?

In Phoenix, Arizona, during August, the rain falls for 7.2 days and regularly aggregates up to 0.59" (15mm) of precipitation.

When it does not snow in Phoenix?

In Phoenix, snow does not fall in January through August, October through December.

Does it snow in Phoenix in August?

In Phoenix, in August, it doesn't snow. In September, it regularly snows.

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

The average day length in August in Phoenix is 13h and 21min.

What time are sunrise and sunset in August in Phoenix?

In August, on the first day of the month, sunrise is at 5:41 am and sunset at 7:28 pm. On the last day of the month, in Phoenix, Arizona, sunrise is at 6:01 am and sunset at 6:55 pm MST.

How long on average sun shines in August in Phoenix?

In August, the average sunshine duration in Phoenix is 12h.

When is the highest UV index in Phoenix?

May through August, with an average maximum UV index of 8, are months with the highest UV index in Phoenix, Arizona.

What is the UV index intensity in August in Phoenix?

In August, the average daily maximum UV index is 8. A UV Index reading of 8 to 10 represents a very high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Phoenix, AZ

Average temperature in August - Phoenix, AZ
  • Average high temperature in August: 102.6°F

The warmest month (with the highest average high temperature) is July (103.6°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in August: 84.7°F

The month with the highest average low temperature is August (84.7°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).

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Average pressure in August
Phoenix, AZ

Average pressure in August - Phoenix, AZ
  • Average pressure in August: 29.87"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).

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Average wind speed in August
Phoenix, AZ

Average wind speed in August - Phoenix, AZ
  • Average wind speed in August: 5.3mph

The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).

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Average humidity in August
Phoenix, AZ

Average humidity in August - Phoenix, AZ
  • Average humidity in August: 30%

The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (16%).

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Average rainfall in August
Phoenix, AZ

Average rainfall in August - Phoenix, AZ
  • Average rainfall in August: 0.59"

The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are May and June (0.08").

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Average rainfall days in August
Phoenix, AZ

Average rainfall days in August - Phoenix, AZ
  • Average rainfall days in August: 7.2 days

The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall in August
Phoenix, AZ

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

The month with the highest snowfall is September (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0").

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Average snowfall days in August
Phoenix, AZ

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

The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).

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

Average daylight in August / Average sunshine in August - Phoenix, AZ
  • Average daylight in August: 13h and 21min

The month with the longest days is June (Average daylight: 14h and 20min).
The month with the shortest days is December (Average daylight: 9h and 59min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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Average sunshine days in August
Phoenix, AZ

Average sunshine days in August - Phoenix, AZ
  • Average sunshine days in August: 21.8 days

The month with the most sunshine days is May (29.2 days).
The month with the least sunshine days is July (21.1 days).

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Average UV index in August
Phoenix, AZ

Average UV index in August - Phoenix, AZ
  • Average UV index in August: 8

The months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
Phoenix, AZ

Average cloud cover in August - Phoenix, AZ
  • Average cloud cover in August: 12

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in August
Phoenix, AZ

Average visibility in August - Phoenix, 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).

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