August weather forecast and climate
Phoenix, AZ

The city of Phoenix, Arizona at dusk
The city of Phoenix, Arizona at dusk
The last month of the summer, August, is another torrid month in Phoenix, Arizona, with temperature in the range of an average low of 84.7°F (29.3°C) and an average high of 102.6°F (39.2°C).

Temperature

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

Humidity

In Phoenix, the average relative humidity is 30%.

Rainfall

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

Snowfall

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

Daylight

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

Sunshine

In August, the average sunshine is 12h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 8 in August transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.

What is the temperature in August in Phoenix?

The average high-temperature, in August, is 102.6°F (39.2°C), while the average low-temperature is 84.7°F (29.3°C).

What is the average humidity in August in Phoenix?

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

How much does it rain in Phoenix in August?

In Phoenix, Arizona, in August, it is raining for 7.2 days, with typically 0.59" (15mm) of accumulated precipitation.

Does it snow in Phoenix in August?

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

When it does not snow in Phoenix?

January through August, October through December are months without snowfall.

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

In August, the average length of the day 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.

What is the UV index intensity in August in Phoenix?

The average daily maximum UV index in August is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation.
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).

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

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

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).

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%).

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").

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).

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

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

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).

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).

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).

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).

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).

Average visibility in August - Phoenix, 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).