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

December 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
December is a cold winter month with the average low temperatures in the range of a freezing 19.9°F (-6.7°C) at the Rims to a mild 37°F (2.8°C) around the canyon region.
North Rim is the coldest and closes in winter along with its trails, while the South Rim has a few open trails.
Snow mainly accumulates in the Rims, but it also has a presence many times along the ground near the canyon. The sun shines up to 7 hours on crisp winter days. Fog is a common feature in winter, but it usually disappears by the mornings.
Pack warm winter jackets, gloves, and caps.

What is the coldest month in Grand Canyon National Park?

The coldest months in Grand Canyon National Park, Arizona, are January and December, with an average high-temperature of 55°F (12.8°C).

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

In December, in Grand Canyon National Park, Arizona, the average high-temperature is 55°F (12.8°C), and the average low-temperature is 36°F (2.2°C).

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

In Grand Canyon National Park, during December, the rain falls for 3 days and regularly aggregates up to 0.8" (19.2mm) of precipitation.

When does it start to snow in Grand Canyon National Park?

December is the first month it typically snows in Grand Canyon National Park, Arizona. Throughout December, Grand Canyon National Park receives 0.1" (1.4mm) of snow.

What is the month with the shortest days in Grand Canyon National Park?

With an average of 9.7h of daylight, December has the shortest days of the year in Grand Canyon National Park.

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

The average length of the day in December in Grand Canyon National Park is 9.7h.

What is the month with the least sunshine in Grand Canyon National Park?

January and December, with an average of 7h of sunshine, are months with the least sunshine in Grand Canyon National Park.

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

In December, the average sunshine in Grand Canyon National Park is 7h.

What is the month with the lowest UV index in Grand Canyon National Park?

December is the month with the lowest UV index, with an average maximum UV index of 2.

How high is the UV index in December in Grand Canyon National Park?

In December, the average daily maximum UV index in Grand Canyon National Park, Arizona, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Grand Canyon National Park, AZ
  • Average high temperature in December: 55°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 December: 36°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 December - Grand Canyon National Park, AZ
  • Average rainfall in December: 0.8"

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 December - Grand Canyon National Park, AZ
  • Average rainfall days in December: 3 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 December - Grand Canyon National Park, AZ
  • Average snowfall in December: 0.1"

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 December / Average sunshine in December - Grand Canyon National Park, AZ
  • Average daylight in December: 9.7h

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 December: 7h

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 December - Grand Canyon National Park, AZ
  • Average UV index in December: 2

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).