Grand Canyon National Park
Arizona, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Grand Canyon National Park, AZ

A stunning aerial panorama on the famed Horseshoe bend at the iconic Grand Canyon National Park
A stunning aerial panorama on the famed Horseshoe bend at the iconic Grand Canyon National Park
May is one of the best times to be in Grand Canyon with comfortable temperatures to the tune of 63°F (17.2°C) to 91.9°F (33.3°C) around the canyon area.
Days are mostly sunny and dry, with hardly any rain. Most of the trails open by May, including those on the North Rim, as the roads are free of ice.
Any backpacking trips to the Rims must take into account that the night temperatures drop to freezing and carry warm clothes and tents. Early visitors take advantage of the park shuttle service along the popular trails.

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

In Grand Canyon National Park, in May, the average high-temperature is 90°F (32.2°C), and the average low-temperature is 60.1°F (15.6°C).

How much does it rain in Grand Canyon National Park in May?

In Grand Canyon National Park, Arizona, in May, during 1 rainfall days, 0.3" (8.4mm) of precipitation is typically accumulated.

When it does not snow in Grand Canyon National Park?

February through November are months without snowfall.

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

In Grand Canyon National Park, Arizona, the average length of the day in May is 14.1h.

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

The average sunshine in May in Grand Canyon National Park is 12h.

What is the UV index intensity in May in Grand Canyon National Park?

In May, the average daily maximum UV index is 10. A UV Index value of 8 to 10 symbolizes a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in May - Grand Canyon National Park, AZ
  • Average high temperature in May: 90°F

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

  • Average low temperature in May: 60°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 May - Grand Canyon National Park, AZ
  • Average rainfall in May: 0.3"

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

Average rainfall days in May - Grand Canyon National Park, AZ
  • Average rainfall days in May: 1 days

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

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

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

Average daylight in May / Average sunshine in May - Grand Canyon National Park, AZ
  • Average daylight in May: 14.1h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in May: 12h

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

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

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).