May 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 May

The last month of the spring, May, is a hot month in Grand Canyon National Park, Arizona, with an average temperature ranging between max 90°F (32.2°C) and min 60.1°F (15.6°C).

Temperature

In Grand Canyon National Park, the average high-temperature in May increases from a moderately hot 80.1°F (26.7°C) in April to a tropical 90°F (32.2°C). In Grand Canyon National Park, the average low-temperature is 60.1°F (15.6°C).

Rainfall

In May, in Grand Canyon National Park, the rain falls for 1 days. Throughout May, 0.31" (8mm) of precipitation is accumulated. Throughout the year, in Grand Canyon National Park, there are 33 rainfall days, and 9.69" (246mm) of precipitation is accumulated.

Snowfall

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

Daylight

In May, the average length of the day is 14h and 6min.
On the first day of May in Grand Canyon National Park, sunrise is at 5:35 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 7:39 pm MST.

Sunshine

In Grand Canyon National Park, the average sunshine in May is 12h.

UV index

In Grand Canyon National Park, the average daily maximum UV index in May is 10. A UV Index reading of 8 to 10 represents a very high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 10 in May transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.
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FAQ

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

The average high-temperature, in May, is 90°F (32.2°C), while the average low-temperature is 60.1°F (15.6°C).

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

In Grand Canyon National Park, Arizona, in May, it is raining for 1 days, with typically 0.31" (8mm) of accumulated precipitation.

When it does not snow in Grand Canyon National Park?

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

What is the average length of the day in May in Grand Canyon National Park?

In May, the average day length in Grand Canyon National Park, Arizona, is 14h and 6min.

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

On the first day of May, sunrise is at 5:35 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 7:39 pm MST.

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

In Grand Canyon National Park, Arizona, the average sunshine duration in May is 12h.

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

The average daily maximum UV index in May is 10. A UV Index estimate of 8 to 10 represents a very high hazard to health from exposure to the Sun's UV radiation.
Average rainfall days
Average snowfall
Average sunshine
Average UV index

Average temperature in May
Grand Canyon National Park, AZ

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).
The 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).

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Average rainfall in May
Grand Canyon National Park, AZ

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 least rainfall) is June (0.2").

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Average rainfall days in May
Grand Canyon National Park, AZ

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).
The months with the least rainy days are May and June (1 days).

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Average snowfall in May
Grand Canyon National Park, AZ

Average snowfall in May - Grand Canyon National Park, AZ
  • Average snowfall in May: 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 May /
Average sunshine in May
Grand Canyon National Park, AZ

Average daylight in May / Average sunshine in May - Grand Canyon National Park, AZ
  • Average daylight in May: 14h and 6min

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 May: 12h

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 May
Grand Canyon National Park, AZ

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