December weather forecast
Gray Mountain, AZ

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Weather in December

December, the first month of the winter in Gray Mountain, is also a frosty month, with an average temperature varying between 28.2°F (-2.1°C) and 43.9°F (6.6°C).

Temperature

The arrival of December signals a shift in temperature, down from a fresh 55.2°F (12.9°C) in November to a frosty 43.9°F (6.6°C). Throughout December, the temperature falls to an average low of 28.2°F (-2.1°C).

Humidity

In December, the average relative humidity in Gray Mountain is 57%.

Rainfall

In Gray Mountain, Arizona, in December, it is raining for 5.4 days, with typically 0.55" (14mm) of accumulated precipitation. In Gray Mountain, Arizona, during the entire year, the rain falls for 57 days and collects up to 4.92" (125mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. The month with the most snowfall in Gray Mountain is December, when snow falls for 4.1 days and typically aggregates up to 1.77" (45mm) of snow.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year.
On the first day of December in Gray Mountain, Arizona, sunrise is at 7:17 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:22 pm MST.

Sunshine

With an average of 7h of sunshine, December has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Gray Mountain. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 2 in December transforms into this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

How cold is it in Gray Mountain in December?

The average high-temperature, in December, in Gray Mountain, is 43.9°F (6.6°C), while the average low-temperature is 28.2°F (-2.1°C).

What is the average humidity in December in Gray Mountain?

In Gray Mountain, the average relative humidity in December is 57%.

How much does it rain in Gray Mountain in December?

In December, the rain falls for 5.4 days. Throughout December, 0.55" (14mm) of precipitation is accumulated.

When does it snow the most in Gray Mountain?

December is the month with the most snowfall. Snow falls for 4.1 days and accumulates 1.77" (45mm) of snow.

How much does it snow in Gray Mountain in December?

In Gray Mountain, during December, snow falls for 4.1 days and regularly aggregates up to 1.77" (45mm) of snow.

What is the month with the shortest days in Gray Mountain?

The month with the shortest days in Gray Mountain is December, with an average of 9h and 48min of daylight.

How many hours of daylight does Gray Mountain have in December?

In December, the average day length in Gray Mountain, Arizona, is 9h and 47min.

What time are sunrise and sunset in December in Gray Mountain?

In December, on the first day of the month, sunrise is at 7:17 am and sunset at 5:12 pm. On the last day of the month, in Gray Mountain, Arizona, sunrise is at 7:35 am and sunset at 5:22 pm MST.

What is the month with the least sunshine in Gray Mountain?

December has the least sunshine of the year in Gray Mountain, with an average of 7h of sunshine.

How many hours of sunshine does Gray Mountain have in December?

In December, the average sunshine duration is 7h.

What are the months with the lowest UV index in Gray Mountain?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Gray Mountain?

The average daily maximum UV index in December in Gray Mountain, Arizona, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Gray Mountain, AZ

Average temperature in December - Gray Mountain, AZ
  • Average high temperature in December: 43.9°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (43.7°F).

  • Average low temperature in December: 28.2°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28°F).

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Average pressure in December
Gray Mountain, AZ

Average pressure in December - Gray Mountain, AZ
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
Gray Mountain, AZ

Average wind speed in December - Gray Mountain, AZ
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is January (5.4mph).

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Average humidity in December
Gray Mountain, AZ

Average humidity in December - Gray Mountain, AZ
  • Average humidity in December: 57%

The month with the highest relative humidity is January (61%).
The month with the lowest relative humidity is June (18%).

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Average rainfall in December
Gray Mountain, AZ

Average rainfall in December - Gray Mountain, AZ
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is January (0.59").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in December
Gray Mountain, AZ

Average rainfall days in December - Gray Mountain, AZ
  • Average rainfall days in December: 5.4 days

The month with the highest number of rainy days is July (6.5 days).
The month with the least rainy days is June (2.6 days).

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Average snowfall in December
Gray Mountain, AZ

Average snowfall in December - Gray Mountain, AZ
  • Average snowfall in December: 1.77"

The month with the highest snowfall is December (1.77").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Gray Mountain, AZ

Average snowfall days in December - Gray Mountain, AZ
  • Average snowfall days in December: 4.1 days

The month with the highest number of snowfall days is December (4.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Gray Mountain, AZ

Average daylight in December / Average sunshine in December - Gray Mountain, AZ
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in December: 7h

The month with the most sunshine is August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in December
Gray Mountain, AZ

Average sunshine days in December - Gray Mountain, AZ
  • Average sunshine days in December: 22.8 days

The month with the most sunshine days is June (26.7 days).
The month with the least sunshine days is February (20.7 days).

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Average UV index in December
Gray Mountain, AZ

Average UV index in December - Gray Mountain, AZ
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Gray Mountain, AZ

Average cloud cover in December - Gray Mountain, AZ
  • Average cloud cover in December: 21

The month with the most cloud cover is December (Cloud cover 21).
The months with the least cloud cover are June and September (Cloud cover 8).

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Average visibility in December
Gray Mountain, AZ

Average visibility in December - Gray Mountain, AZ
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Gray Mountain, Arizona, USA

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