July weather forecastGrand Canyon National Park, AZ

Weather in July

July serves as the hottest month in Grand Canyon National Park, with temperatures soaring to 104°F (40°C). The month sees a spike in rainfall to 0.9" (23mm), a reminder that the rainy season is on the horizon. Extensive daylight hours extend the exploration time at the park. Despite the high UV index, the park remains a go-to destination for outdoorsy travellers. Nevertheless, precautions are necessary to combat the July heat.

Temperature

In Grand Canyon National Park, Arizona, the month of July registers the highest temperatures, averaging 104°F (40°C) at the peak and 73.9°F (23.3°C) at the lowest.

Rainfall

In Grand Canyon National Park, in July, it is raining for 3 days, with typically 0.91" (23mm) of accumulated precipitation. In Grand Canyon National Park, during the entire year, the rain falls for 33 days and collects up to 9.69" (246mm) of precipitation.

Snowfall

February through November are months without snowfall.

Daylight

In Grand Canyon National Park, the average length of the day in July is 14h and 20min.
On the first day of the month, sunrise is at 5:15 am and sunset at 7:49 pm. On the last day of July, in Grand Canyon National Park, Arizona, sunrise is at 5:35 am and sunset at 7:34 pm MST.

Sunshine

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

UV index

June and July, with an average maximum UV index of 11, are months with the highest UV index. A UV Index of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 11 during July leads to these instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. 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. Every two hours, apply and reapply an SPF 30+ broad-spectrum sunscreen, especially after swimming or engaging in outdoor activities.