December weather forecast
San Carlos, AZ

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Weather in December

The first month of the winter, December, is also a fresh month in San Carlos, Arizona, with an average temperature ranging between min 36.9°F (2.7°C) and max 55.2°F (12.9°C).

Temperature

December proves to be the coldest month, recording an average maximum temperature of 55.2°F (12.9°C) and a minimum temperature of 36.9°F (2.7°C).

Humidity

The most humid month in San Carlos is December, with an average relative humidity of 53%.

Rainfall

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

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 1.1 snowfall days, and 0.2" (5mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of December, 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 5:24 pm MST.

Sunshine

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

UV index

With an average maximum UV index of 2, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 2 during December translates into the following guidance:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. When the Sun is at its strongest around midday, find shade and limit exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in San Carlos?

In San Carlos, the average lowest temperatures are observed in December, with a high of 55.2°F (12.9°C) and a low of 36.9°F (2.7°C).

What is the average December temperature?

The average high-temperature, in December, in San Carlos, is 55.2°F (12.9°C), while the average low-temperature is 36.9°F (2.7°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is calculated to be 86°F (30°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 53%.

What is the average humidity in December?

In San Carlos, the average relative humidity in December is 53%.

How much does it rain in December?

In San Carlos, in December, it is raining for 7.5 days, with typically 1.1" (28mm) of accumulated precipitation.

When does it start to snow?

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

What is the month with the shortest days?

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

How many hours of daylight does San Carlos have in December?

In San Carlos, the average day length in December is 9h and 59min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 5:14 pm. On the last day of the month, in San Carlos, sunrise is at 7:25 am and sunset at 5:24 pm MST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 6.7h of sunshine.

How many hours of sunshine does San Carlos have in December?

In December, the average sunshine duration is 6.7h.

When is the lowest UV index?

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

What is the UV index reading in December?

In San Carlos, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
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
San Carlos, AZ

Average temperature in December - San Carlos, 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).

Average pressure in December
San Carlos, AZ

Average pressure in December - San Carlos, 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).

Average wind speed in December
San Carlos, AZ

Average wind speed in December - San Carlos, 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).

Average humidity in December
San Carlos, AZ

Average humidity in December - San Carlos, 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%).

Average rainfall in December
San Carlos, AZ

Average rainfall in December - San Carlos, 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").

Average rainfall days in December
San Carlos, AZ

Average rainfall days in December - San Carlos, 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).

Average snowfall in December
San Carlos, AZ

Average snowfall in December - San Carlos, 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").

Average snowfall days in December
San Carlos, AZ

Average snowfall days in December - San Carlos, 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).

Average daylight in December /
Average sunshine in December
San Carlos, AZ

Average daylight in December / Average sunshine in December - San Carlos, 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).

Average sunshine days in December
San Carlos, AZ

Average sunshine days in December - San Carlos, 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).

Average UV index in December
San Carlos, AZ

Average UV index in December - San Carlos, 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).

Average cloud cover in December
San Carlos, AZ

Average cloud cover in December - San Carlos, 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).

Average visibility in December
San Carlos, AZ

Average visibility in December - San Carlos, 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).

San Carlos, Arizona, USA

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