December weather forecast and climate
Vail, CO

Sunrise over Vail, Colorado hitting the slope of a mountain with nearby golden colored trees and a hill in the distance
Sunrise over Vail, Colorado hitting the slope of a mountain with nearby golden colored trees and a hill in the distance

Weather in December

The first month of the winter, December, is also a subzero cold month in Vail, Colorado, with average temperature varying between 3°F (-16.1°C) and 24.1°F (-4.4°C).

Temperature

January and December, with an average high-temperature of 24.1°F (-4.4°C), are the coldest months.

Humidity

In December, the average relative humidity in Vail is 85%.

Rainfall

In Vail, it is raining for 3.9 days, with typically 1.22" (31mm) of accumulated precipitation. Throughout the year, in Vail, there are 82.8 rainfall days, and 14.8" (376mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Vail, Colorado, are January through December. In Vail, during December, snow falls for 15 days and regularly aggregates up to 10.08" (256mm) of snow. Throughout the year, there are 107.8 snowfall days, and 77.72" (1974mm) of snow is accumulated.

Daylight

With an average of 9.4h of daylight, December has the shortest days of the year in Vail.

Sunshine

In December, the average sunshine in Vail is 5.8h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Vail?

The coldest months in Vail, Colorado, are January and December, with an average high-temperature of 24.1°F (-4.4°C).

What is the average humidity in December in Vail?

In Vail, Colorado, the average relative humidity in December is 85%.

How many days does it rain in December in Vail?

In December, the rain falls for 3.9 days. Throughout December, 1.22" (31mm) of precipitation is accumulated.

How many days does it snow in December in Vail?

In Vail, in December, snow falls for 15 days, with typically accumulated 10.08" (256mm) of snow.

What is the month with the shortest days in Vail?

With an average of 9.4h of daylight, December has the shortest days of the year in Vail.

How many hours of daylight does Vail have in December?

The average length of the day in December is 9.4h.

How many hours of sunshine does Vail have in December?

In December, the average sunshine in Vail is 5.8h.

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

With an average maximum UV index of 1, December is the month with the lowest UV index in Vail, Colorado.

How high is the UV index in December in Vail?

In Vail, Colorado, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Vail, CO

Average temperature in December - Vail, CO
  • Average high temperature in December: 24.1°F

The warmest month (with the highest average high temperature) is July (70.3°F).
Months with the lowest average high temperature are January and December (24.1°F).

  • Average low temperature in December: 3°F

The month with the highest average low temperature is July (41.4°F).
The coldest month (with the lowest average low temperature) is January (1.2°F).

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Average pressure in December
Vail, CO

Average pressure in December - Vail, CO
  • Average pressure in December: 30.17"

The month with the highest atmospheric pressure is January (30.21").
Months with the lowest atmospheric pressure are April and May (29.94").

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Average wind speed in December
Vail, CO

Average wind speed in December - Vail, CO
  • Average wind speed in December: 4.9mph

The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Vail, CO

Average humidity in December - Vail, CO
  • Average humidity in December: 85%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (51%).

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Average rainfall in December
Vail, CO

Average rainfall in December - Vail, CO
  • Average rainfall in December: 1.22"

The wettest months (with the highest rainfall) are May and July (1.77").
The driest month (with the least rainfall) is November (0.71").

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Average rainfall days in December
Vail, CO

Average rainfall days in December - Vail, CO
  • Average rainfall days in December: 3.9 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is November (1.6 days).

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Average snowfall in December
Vail, CO

Average snowfall in December - Vail, CO
  • Average snowfall in December: 10.08"

The month with the highest snowfall is February (11.38").
The month with the least snowfall is July (0.12").

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Average snowfall days in December
Vail, CO

Average snowfall days in December - Vail, CO
  • Average snowfall days in December: 15 days

The month with the highest number of snowfall days is February (16 days).
The month with the least snowfall days is July (0.3 days).

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

Average daylight in December / Average sunshine in December - Vail, CO
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.8h

The month with the most sunshine is June (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in December
Vail, CO

Average sunshine days in December - Vail, CO
  • Average sunshine days in December: 16.6 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in December
Vail, CO

Average UV index in December - Vail, CO
  • Average UV index in December: 1

Months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in December
Vail, CO

Average cloud cover in December - Vail, CO
  • Average cloud cover in December: 43

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 15).

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Average visibility in December
Vail, CO

Average visibility in December - Vail, CO
  • Average visibility in December: 4mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March, April and December (4mi).

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