August weather forecastGrand Canyon National Park, AZ
August
Weather in August
Grand Canyon National Park witnesses a slight decrease in temperature in August. Despite this, it remains quite hot with peaks at 100°F (37.8°C). Marked increase in rainfall to 1.5" (38mm) hints at the onset of the rainy season. Although the daylight hours decrease slightly as compared to the preceding months, August promises ample sun-kissed hours for park visitors. Be prepared for possible rain showers during your expedition in this month.Temperature
Grand Canyon National Park observes a minor difference in average high-temperatures between July's 104°F (40°C) and August's 100°F (37.8°C). Grand Canyon National Park records a marked daily temperature contrast, with an average low-temperature of 72°F (22.2°C) during the nights of August.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.Daylight
The average length of the day in August in Grand Canyon National Park is 13h and 29min.On the first day of August, sunrise is at 5:36 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 6:57 pm MST.
Sunshine
The average sunshine in August is 11h.UV index
The average daily maximum UV index in August in Grand Canyon National Park is 10. A UV Index reading of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 10 in August interprets into the following recommendations:
Precautions are essential; the risk of damage to unprotected skin and eyes is too high. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Directly after outdoor activities or swimming, a broad-spectrum sunscreen with SPF 30+ should be applied generously and reapplied frequently.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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").
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).
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").
Average daylight in August /
Average sunshine in August
Grand Canyon National Park, AZ
- Average daylight in August: 13h and 30min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- 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).
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).
