Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Onset of December comes with a temperature decline, the average high falling from a fresh 55.2°F (12.9°C) in November to a chilly 43.9°F (6.6°C). In December, the average low-temperature is a freezing cold 28.2°F (-2.1°C).Humidity
The average relative humidity in December is 57%.Rainfall
In Gray Mountain, in December, it is raining for 5.4 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, there are 57 rainfall days, and 4.92" (125mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall is December, when snow falls for 4.1 days and typically aggregates up to 1.77" (45mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 48min of daylight.On the first day of December, 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
The month with the least sunshine is December, with an average of 7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Gray Mountain?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Gray Mountain have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Gray Mountain, Arizona, USA
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