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 very hot month in Phoenix, Arizona, with average temperature ranging between min 84.7°F (29.3°C) and max 102.6°F (39.2°C).

Temperature

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

Humidity

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

Rainfall

In Phoenix, it is raining for 7.2 days, with typically 0.59" (15mm) of accumulated precipitation. In Phoenix, during the entire year, the rain falls for 44.6 days and collects up to 5.04" (128mm) of precipitation.

Snowfall

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

Daylight

In Phoenix, the average length of the day is 13.3h.

Sunshine

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

UV index

Months with the highest UV index in Phoenix are May through August, with an average maximum UV index of 8. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. 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 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, in August, during 7.2 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

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

How many hours of daylight does Phoenix have in August?

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

How long on average sun shines in August in Phoenix?

In Phoenix, the average sunshine in August 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.

How high is the UV index in August in Phoenix?

In Phoenix, the average daily maximum UV index in August is 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in August
Phoenix, AZ

Average temperature in August - Phoenix, AZ
  • Average high temperature in August: 39.2°C

The warmest month (with the highest average high temperature) is July (39.8°C).
The month with the lowest average high temperature is December (17.2°C).

  • Average low temperature in August: 29.3°C

The month with the highest average low temperature is August (29.3°C).
The coldest month (with the lowest average low temperature) is January (8.6°C).

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Average pressure in August
Phoenix, AZ

Average pressure in August - Phoenix, AZ
  • Average pressure in August: 1011.4mbar

The month with the highest atmospheric pressure is January (1018.9mbar).
The month with the lowest atmospheric pressure is June (1009.5mbar).

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Average wind speed in August
Phoenix, AZ

Average wind speed in August - Phoenix, AZ
  • Average wind speed in August: 8.5km/h

The windiest month (with the highest average wind speed) is April (10.3km/h).
The calmest month (with the lowest average wind speed) is December (7km/h).

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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: 15mm

The wettest month (with the highest rainfall) is July (19mm).
The driest months (with the least rainfall) are May and June (2mm).

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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: 0mm

The month with the highest snowfall is September (1mm).
Months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).

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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).
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: 13.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in August: 12h

The month with the most sunshine is June (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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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

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: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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