December weather forecast
Swift Trail Junction, AZ

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Weather in December

The first month of the winter, December, is also a fresh month in Swift Trail Junction, Arizona, with an average temperature varying between 37°F and 54.7°F.

Temperature

During the coldest month, December, temperatures average a high of 54.7°F and a low of 37°F.

Humidity

December is the most humid month in Swift Trail Junction, with an average relative humidity of 51%.

Rainfall

In Swift Trail Junction, in December, during 7.3 rainfall days, 0.94" of precipitation is typically accumulated. Throughout the year, there are 79.6 rainfall days, and 8.58" of precipitation is accumulated.

Snowfall

Months with snowfall in Swift Trail Junction are January, February, September and December. December is the first month it typically snows in Swift Trail Junction. Throughout December, in the average 0.4 snowfall days, it receives 0.12" of snow. In Swift Trail Junction, during the entire year, snow falls for 1.3 days and aggregates up to 0.75" of snow.

Daylight

The month with the shortest days in Swift Trail Junction, Arizona, is December, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 5:12 pm. On the last day of December, in Swift Trail Junction, sunrise is at 7:20 am and sunset at 5:22 pm MST.

Sunshine

December has the least sunshine of the year in Swift Trail Junction, with an average of 7h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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FAQ

What is the coldest time of year in Swift Trail Junction?

In Swift Trail Junction, Arizona, the average lowest temperatures are observed in December, with a high of 54.7°F and a low of 37°F.

What is the usual temperature for Swift Trail Junction in December?

Swift Trail Junction in December has an average high-temperature of 54.7°F and an average low-temperature of 37°F. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in September is evaluated at 84.2°F.

What is the most humid month in Swift Trail Junction?

December is the most humid month in Swift Trail Junction, Arizona, with an average relative humidity of 51%.

What is the average humidity in December in Swift Trail Junction?

The average relative humidity in December in Swift Trail Junction, Arizona, is 51%.

How many days does it rain in December in Swift Trail Junction?

In Swift Trail Junction, Arizona, during December, the rain falls for 7.3 days and regularly aggregates up to 0.94" of precipitation.

When does it start snowing in Swift Trail Junction?

December is the first month it typically snows in Swift Trail Junction, Arizona. Throughout December, in the average 0.4 snowfall days, it receives 0.12" of snow.

What is the month with the shortest days in Swift Trail Junction?

The month with the shortest days in Swift Trail Junction, Arizona, is December, with an average of 10h and 0min of daylight.

How many hours of daylight does Swift Trail Junction have in December?

In Swift Trail Junction, Arizona, the average day length in December is 10h and 2min.

When is the sunrise / sunset in December in Swift Trail Junction?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:22 pm MST.

What is the month with the least sunshine in Swift Trail Junction?

With an average of 7h of sunshine, December has the least sunshine of the year in Swift Trail Junction, Arizona.

How many hours of sunshine does Swift Trail Junction have in December?

In Swift Trail Junction, the average sunshine duration in December is 7h.

When is the lowest UV index in Swift Trail Junction?

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 Swift Trail Junction?

The average daily maximum UV index in December in Swift Trail Junction is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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
Swift Trail Junction, AZ

Average temperature in December - Swift Trail Junction, AZ
  • Average high temperature in December: 54.7°F

The warmest month (with the highest average high temperature) is June (93.2°F).
The month with the lowest average high temperature is December (54.7°F).

  • Average low temperature in December: 37°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).

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Average pressure in December
Swift Trail Junction, AZ

Average pressure in December - Swift Trail Junction, 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
Swift Trail Junction, AZ

Average wind speed in December - Swift Trail Junction, AZ
  • Average wind speed in December: 5.2mph

The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest months (with the lowest average wind speed) are January and December (5.2mph).

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Average humidity in December
Swift Trail Junction, AZ

Average humidity in December - Swift Trail Junction, AZ
  • Average humidity in December: 51%

The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is June (20%).

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Average rainfall in December
Swift Trail Junction, AZ

Average rainfall in December - Swift Trail Junction, AZ
  • Average rainfall in December: 0.94"

The wettest month (with the highest rainfall) is July (1.3").
The driest months (with the least rainfall) are April and May (0.16").

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Average rainfall days in December
Swift Trail Junction, AZ

Average rainfall days in December - Swift Trail Junction, AZ
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is May (3.2 days).

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Average snowfall in December
Swift Trail Junction, AZ

Average snowfall in December - Swift Trail Junction, AZ
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.39").
The months with the least snowfall are March, April, May, June, July, August, October and November (0").

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Average snowfall days in December
Swift Trail Junction, AZ

Average snowfall days in December - Swift Trail Junction, AZ
  • Average snowfall days in December: 0.4 days

The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Swift Trail Junction, AZ

Average daylight in December / Average sunshine in December - Swift Trail Junction, 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: 7h and 0min

The months with the most sunshine are June and August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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Average sunshine days in December
Swift Trail Junction, AZ

Average sunshine days in December - Swift Trail Junction, AZ
  • Average sunshine days in December: 23 days

The month with the most sunshine days is May (26.7 days).
The month with the least sunshine days is July (12.6 days).

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Average UV index in December
Swift Trail Junction, AZ

Average UV index in December - Swift Trail Junction, AZ
  • Average UV index in December: 2

The months with the highest UV index are May, 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
Swift Trail Junction, AZ

Average cloud cover in December - Swift Trail Junction, AZ
  • Average cloud cover in December: 20

The month with the most cloud cover is December (Cloud cover 20).
The months with the least cloud cover are May and June (Cloud cover 8).

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Average visibility in December
Swift Trail Junction, AZ

Average visibility in December - Swift Trail Junction, 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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Swift Trail Junction, Arizona, USA

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