August weather forecast
Grand Canyon National Park, AZ

The famed Horseshoe bend at the iconic Grand Canyon National Park, Arizona
The famed Horseshoe bend at the iconic Grand Canyon National Park, Arizona

Weather in August

The last month of the summer, August, is another very hot month in Grand Canyon National Park, Arizona, with an average temperature varying between 72°F (22.2°C) and 100°F (37.8°C).

Temperature

In Grand Canyon National Park, the average high-temperature in August is relatively the same as in July - a very hot 100°F (37.8°C). In August, the average low-temperature is 72°F (22.2°C).

Rainfall

August is the month with the most rainfall. Rain falls for 5 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

February through November are months without snowfall in Grand Canyon National Park, Arizona.

Daylight

In August, the average length of the day in Grand Canyon National Park, Arizona, is 13h and 29min.
On the first day of August, sunrise is at 5:35 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:57 pm MST.

Sunshine

In August, the average sunshine in Grand Canyon National Park is 11h.

UV index

The average daily maximum UV index in August in Grand Canyon National Park is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 10 in August interpret into the following advice:
Take extra precautions. Protection against sun damage is required. 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 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.
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FAQ

What is the temperature in August in Grand Canyon National Park?

The average high-temperature, in August, in Grand Canyon National Park, Arizona, is 100°F (37.8°C), while the average low-temperature is 72°F (22.2°C).

What is the wettest month in Grand Canyon National Park?

August is the month with the most rainfall. Rain falls for 5 days and accumulates 1.46" (37mm) of precipitation.

How many days does it rain in August in Grand Canyon National Park?

In August, in Grand Canyon National Park, Arizona, the rain falls for 5 days. Throughout August, 1.46" (37mm) of precipitation is accumulated.

When it does not snow in Grand Canyon National Park?

In Grand Canyon National Park, snow does not fall in February through November.

How many hours of daylight does Grand Canyon National Park have in August?

In August, the average day length in Grand Canyon National Park, Arizona, is 13h and 29min.

What time are sunrise and sunset in August in Grand Canyon National Park?

On the first day of August in Grand Canyon National Park, sunrise is at 5:35 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:57 pm MST.

How long on average sun shines in August in Grand Canyon National Park?

In August, the average sunshine duration in Grand Canyon National Park is 11h.

How high is the UV index in August in Grand Canyon National Park?

In August, the average daily maximum UV index in Grand Canyon National Park, Arizona, is 10. A UV Index of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average snowfall
Average sunshine
Average UV index

Average temperature in August
Grand Canyon National Park, AZ

Average temperature in August - Grand Canyon National Park, AZ
  • Average high temperature in August: 100°F

The warmest month (with the highest average high temperature) is July (104°F).
The months with the lowest average high temperature are January and December (55°F).

  • Average low temperature in August: 72°F

The month with the highest average low temperature is July (74°F).
The coldest month (with the lowest average low temperature) is January (35°F).

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Average rainfall in August
Grand Canyon National Park, AZ

Average rainfall in August - Grand Canyon National Park, AZ
  • Average rainfall in August: 1.5"

The wettest month (with the highest rainfall) is August (1.5").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in August
Grand Canyon National Park, AZ

Average rainfall days in August - Grand Canyon National Park, AZ
  • Average rainfall days in August: 5 days

The month with the highest number of rainy days is August (5 days).
The months with the least rainy days are May and June (1 days).

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Average snowfall in August
Grand Canyon National Park, AZ

Average snowfall in August - Grand Canyon National Park, AZ
  • Average snowfall in August: 0"

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

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Average daylight in August /
Average sunshine in August
Grand Canyon National Park, AZ

Average daylight in August / Average sunshine in August - Grand Canyon National Park, AZ
  • Average daylight in August: 13h and 29min

The month with the longest days is June (Average daylight: 14h and 35min).
The month with the shortest days is December (Average daylight: 9h and 45min).

  • Average sunshine in August: 11h

The month with the most sunshine is June (Average sunshine: 13h).
The months with the least sunshine are January and December (Average sunshine: 7h).

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Average UV index in August
Grand Canyon National Park, AZ

Average UV index in August - Grand Canyon National Park, AZ
  • Average UV index in August: 10

The months with the highest UV index are June and July (UV index 11).
The month with the lowest UV index is December (UV index 2).

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