December weather forecast
Swift Trail Junction, AZ

Weather in December

December, the first month of the winter, in Swift Trail Junction, is still a cool month, with average temperature varying between 37°F (2.8°C) and 54.7°F (12.6°C).

Temperature

With an average high-temperature of 54.7°F (12.6°C) and an average low-temperature of 37°F (2.8°C), December is the coldest month.

Humidity

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

Rainfall

In Swift Trail Junction, Arizona,, it is raining for 7.3 days, with typically 0.94" (24mm) of accumulated precipitation. Throughout the year, in Swift Trail Junction, there are 79.6 rainfall days, and 8.58" (218mm) of precipitation is accumulated.

Snowfall

January, February, September and December are months with snowfall in Swift Trail Junction. December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 1.3 snowfall days, and 0.75" (19mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 10h of daylight.

Sunshine

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

UV index

December is the month with the lowest UV index in Swift Trail Junction, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Swift Trail Junction?

December is the coldest month in Swift Trail Junction, Arizona, with an average high-temperature of 54.7°F (12.6°C) and an average low-temperature of 37°F (2.8°C).

What is the most humid month in Swift Trail Junction?

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

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

In December, the average relative humidity in Swift Trail Junction is 51%.

How much does it rain in Swift Trail Junction in December?

In Swift Trail Junction, Arizona, in December, during 7.3 rainfall days, 0.94" (24mm) of precipitation is typically accumulated.

When does it start snowing in Swift Trail Junction?

December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.12" (3mm) of snow.

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

With an average of 10h of daylight, December has the shortest days of the year in Swift Trail Junction, Arizona.

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

The average length of the day in December in Swift Trail Junction is 10h.

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

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

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

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

When is the lowest UV index in Swift Trail Junction?

The month with the lowest UV index in Swift Trail Junction is December, with an average maximum UV index of 2.

What is the UV index reading in December in Swift Trail Junction?

In December, the average daily maximum UV index in Swift Trail Junction is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV rays.

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"

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

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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").
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).
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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 7h

Months with the most sunshine are June and August (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 7h).

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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

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).
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

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

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