Grand Canyon Weather in August
Grand Canyon in August sees very high temperatures, with highs around 30°C (86°F) and overnight lows of 15°C (59°F). Rainfall is at its peak this month, around 58 mm (2.3 in) on average, so waterproofs are essential.
Rainfall in Grand Canyon in August
As the rainiest month, carrying an umbrella is advisable to manage the frequent rain. Rain is expected on roughly 12 days, totalling around 58 mm (2.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Grand Canyon in August
If you're visiting Grand Canyon in August, expect highs of 30°C (86°F) and overnight lows around 15°C (59°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.If you prefer dry days with pleasant temperatures, April, May, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Canyon's climate page.
Grand Canyon Temperature in August
Min Temperature
15°C (59°F)
Max Temperature
30°C (86°F)
Chance of Rain
41%
Precipitation
58 mm (2.3 in)
Rainy days
12 days
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Grand Canyon typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are cool, with lows typically ranging from 9°C (48°F) to 13°C (55°F).
Average temperatures in August
Historical weather for Grand Canyon in August
Browse day-by-day weather records for Grand Canyon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grand Canyon historical weather extremes in August
According to our 21 years of weather records for Grand Canyon, the following extremes were recorded between 2004 and 2025.
- On August 19, 2020, temperatures climbed to 36°C (97°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 18°C (64°F), recorded on August 27, 2016.
- The lowest overnight temperature recorded in August was -1°C (30°F) (August 8, 2009).
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Grand Canyon in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days.What To Do in Grand Canyon in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Canyon's climate page.
See the full Grand Canyon climate overview or explore weather in the United States of America.
