December weather forecast
Arlington, CO

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Weather in December

The first month of the winter, December, is still a chilly month in Arlington, Colorado, with an average temperature fluctuating between 26.2°F (-3.2°C) and 43.7°F (6.5°C).

Temperature

December, with an average high of 43.7°F (6.5°C) and a low of 26.2°F (-3.2°C), signifies the coldest month of the year.

Humidity

In Arlington, the average relative humidity in December is 57%.

Rainfall

In Arlington, in December, during 3.1 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Arlington, during the entire year, the rain falls for 83.3 days and collects up to 10.16" (258mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Arlington. In Arlington, Colorado, in December, during 4.6 snowfall days, 1.57" (40mm) of snow is typically accumulated. Throughout the year, there are 24.2 snowfall days, and 11.5" (292mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 6:52 am and sunset at 4:33 pm. On the last day of December, in Arlington, sunrise is at 7:10 am and sunset at 4:43 pm MST.

Sunshine

In December, the average sunshine is 6.8h.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

What month is the coldest in Arlington?

December, noted for its average high-temperature of 43.7°F (6.5°C) and an average low-temperature of 26.2°F (-3.2°C), is considered the coldest month in Arlington.

How cold is it in Arlington in December?

In Arlington, in December, the average high-temperature is 43.7°F (6.5°C), and the average low-temperature is 26.2°F (-3.2°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in September is appraised at 82.4°F (28°C).

What is the average humidity in December in Arlington?

The average relative humidity in December in Arlington, Colorado, is 57%.

How many days does it rain in December in Arlington?

In December, in Arlington, the rain falls for 3.1 days. Throughout December, 0.35" (9mm) of precipitation is accumulated.

How many days does it snow in December in Arlington?

In Arlington, during December, snow falls for 4.6 days and regularly aggregates up to 1.57" (40mm) of snow.

What is the month with the shortest days in Arlington?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Arlington.

How many hours of daylight does Arlington have in December?

In Arlington, the average day length in December is 9h and 33min.

When are sunrise and sunset in December in Arlington?

In December, on the first day of the month, sunrise is at 6:52 am and sunset at 4:33 pm. On the last day of the month, in Arlington, sunrise is at 7:10 am and sunset at 4:43 pm MST.

How many hours of sunshine does Arlington have in December?

In Arlington, Colorado, the average sunshine duration in December is 6.8h.

What is the month with the lowest UV index in Arlington?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Arlington.

How high is the UV index in December in Arlington?

In Arlington, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Arlington, CO

Average temperature in December - Arlington, CO
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 26.2°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).

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Average pressure in December
Arlington, CO

Average pressure in December - Arlington, CO
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in December
Arlington, CO

Average wind speed in December - Arlington, CO
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest months (with the lowest average wind speed) are January and December (7.8mph).

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Average humidity in December
Arlington, CO

Average humidity in December - Arlington, CO
  • Average humidity in December: 57%

The month with the highest relative humidity is January (58%).
The month with the lowest relative humidity is June (37%).

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Average rainfall in December
Arlington, CO

Average rainfall in December - Arlington, CO
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is November (0.31").

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Average rainfall days in December
Arlington, CO

Average rainfall days in December - Arlington, CO
  • Average rainfall days in December: 3.1 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (2.4 days).

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Average snowfall in December
Arlington, CO

Average snowfall in December - Arlington, CO
  • Average snowfall in December: 1.57"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Arlington, CO

Average snowfall days in December - Arlington, CO
  • Average snowfall days in December: 4.6 days

The month with the highest number of snowfall days is February (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Arlington, CO

Average daylight in December / Average sunshine in December - Arlington, CO
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in December
Arlington, CO

Average sunshine days in December - Arlington, CO
  • Average sunshine days in December: 24.9 days

The month with the most sunshine days is December (24.9 days).
The month with the least sunshine days is July (14.9 days).

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Average UV index in December
Arlington, CO

Average UV index in December - Arlington, CO
  • 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, November and December (UV index 2).

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Average cloud cover in December
Arlington, CO

Average cloud cover in December - Arlington, CO
  • Average cloud cover in December: 23

The months with the most cloud cover are February and April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

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Average visibility in December
Arlington, CO

Average visibility in December - Arlington, CO
  • 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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Arlington, Colorado, USA

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