December weather forecast
Coolidge Dam, AZ

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Weather in December

December, the first month of the winter in Coolidge Dam, is still a cool month, with an average temperature varying between 55.2°F (12.9°C) and 36.9°F (2.7°C).

Temperature

Coolidge Dam experiences its lowest temperatures in December, with an average peak of 55.2°F (12.9°C) and a low of 36.9°F (2.7°C).

Humidity

The most humid month in Coolidge Dam, Arizona, is December, with an average relative humidity of 53%.

Rainfall

In Coolidge Dam, in December, it is raining for 7.5 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, in Coolidge Dam, there are 75.1 rainfall days, and 8.82" (224mm) of precipitation is accumulated.

Snowfall

January through March and December are months with snowfall in Coolidge Dam, Arizona. December is the first month it typically snows in Coolidge Dam. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Coolidge Dam, during the entire year, snow falls for 1.1 days and aggregates up to 0.2" (5mm) of snow.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 7:08 am and sunset at 5:14 pm. On the last day of December, sunrise is at 7:25 am and sunset at 5:25 pm MST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, an average UV index of 2 transforms into the following instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What is the coldest time of year in Coolidge Dam?

December stands out as Coolidge Dam's coldest month, with an average high-temperature of 55.2°F (12.9°C) and a low-temperature of 36.9°F (2.7°C).

What is the usual temperature for Coolidge Dam in December?

In Coolidge Dam, in December, the average high-temperature is 55.2°F (12.9°C), and the average low-temperature is 36.9°F (2.7°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 86°F (30°C).

What is the most humid month in Coolidge Dam?

With an average relative humidity of 53%, December is the most humid month in Coolidge Dam.

What is the average humidity in December in Coolidge Dam?

In December, the average relative humidity in Coolidge Dam, Arizona, is 53%.

How much does it rain in Coolidge Dam in December?

In Coolidge Dam, in December, during 7.5 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

When does it start to snow in Coolidge Dam?

December is the first month it typically snows in Coolidge Dam. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Coolidge Dam?

December has the shortest days of the year, with an average of 10h and 0min of daylight.

What is the average length of the day in December in Coolidge Dam?

The average day length in December in Coolidge Dam, Arizona, is 10h and 0min.

What time are sunrise and sunset in December in Coolidge Dam?

On the first day of December in Coolidge Dam, Arizona, sunrise is at 7:08 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:25 pm MST.

What is the month with the least sunshine in Coolidge Dam?

With an average of 6.7h of sunshine, December has the least sunshine of the year in Coolidge Dam, Arizona.

How many hours of sunshine does Coolidge Dam have in December?

In December, the average sunshine duration in Coolidge Dam is 6.7h.

When is the lowest UV index in Coolidge Dam?

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

How high is the UV index in December in Coolidge Dam?

In Coolidge Dam, Arizona, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Coolidge Dam, AZ

Average temperature in December - Coolidge Dam, AZ
  • Average high temperature in December: 55.2°F

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in December: 36.9°F

The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is December (36.9°F).

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Average pressure in December
Coolidge Dam, AZ

Average pressure in December - Coolidge Dam, AZ
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in December
Coolidge Dam, AZ

Average wind speed in December - Coolidge Dam, AZ
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest months (with the lowest average wind speed) are August and December (5.2mph).

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Average humidity in December
Coolidge Dam, AZ

Average humidity in December - Coolidge Dam, AZ
  • Average humidity in December: 53%

The month with the highest relative humidity is December (53%).
The month with the lowest relative humidity is June (21%).

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Average rainfall in December
Coolidge Dam, AZ

Average rainfall in December - Coolidge Dam, AZ
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is August (1.22").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in December
Coolidge Dam, AZ

Average rainfall days in December - Coolidge Dam, AZ
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is June (2.9 days).

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Average snowfall in December
Coolidge Dam, AZ

Average snowfall in December - Coolidge Dam, AZ
  • Average snowfall in December: 0.04"

The month with the highest snowfall is January (0.08").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Coolidge Dam, AZ

Average snowfall days in December - Coolidge Dam, AZ
  • Average snowfall days in December: 0.2 days

The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Coolidge Dam, AZ

Average daylight in December / Average sunshine in December - Coolidge Dam, AZ
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The month with the most sunshine is August (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in December
Coolidge Dam, AZ

Average sunshine days in December - Coolidge Dam, AZ
  • Average sunshine days in December: 22.9 days

The month with the most sunshine days is May (26.8 days).
The month with the least sunshine days is July (13.1 days).

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Average UV index in December
Coolidge Dam, AZ

Average UV index in December - Coolidge Dam, AZ
  • Average UV index in December: 2

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

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Average cloud cover in December
Coolidge Dam, AZ

Average cloud cover in December - Coolidge Dam, AZ
  • Average cloud cover in December: 23

The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is June (Cloud cover 7).

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Average visibility in December
Coolidge Dam, AZ

Average visibility in December - Coolidge Dam, 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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Coolidge Dam, Arizona, USA

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