December weather forecast and climate
Carbondale, CO

Weather in December

December, the first month of the winter, in Carbondale, is also a subzero cold month, with average temperature fluctuating between 10.8°F (-11.8°C) and 29.8°F (-1.2°C).

Temperature

In Carbondale, the average high-temperature in December drops, from a wintry 40.6°F (4.8°C) in November, to a freezing cold 29.8°F (-1.2°C). In December, the average low-temperature is 10.8°F (-11.8°C).

Humidity

In Carbondale, the average relative humidity in December is 81%.

Rainfall

In Carbondale, it is raining for 9.3 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, in Carbondale, there are 98 rainfall days, and 12.2" (310mm) of precipitation is accumulated.

Snowfall

January through June, October through December are months with snowfall. In Carbondale, in December, during 14.3 snowfall days, 9.84" (250mm) of snow is typically accumulated. Throughout the year, in Carbondale, there are 78.7 snowfall days, and 56.02" (1423mm) of snow is accumulated.

Daylight

The month with the shortest days in Carbondale is December, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine is 6.5h.

UV index

Months with the lowest UV index in Carbondale are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
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. 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 temperature in December in Carbondale?

In December, in Carbondale, Colorado, the average high-temperature is 29.8°F (-1.2°C), and the average low-temperature is 10.8°F (-11.8°C).

What is the average humidity in December in Carbondale?

In December, the average relative humidity in Carbondale is 81%.

How many days does it rain in December in Carbondale?

In December, in Carbondale, Colorado, the rain falls for 9.3 days. Throughout December, 1.3" (33mm) of precipitation is accumulated.

How many days does it snow in December in Carbondale?

In December, in Carbondale, it is snowing for 14.3 days. Throughout December, 9.84" (250mm) of snow is accumulated.

What is the month with the shortest days in Carbondale?

December has the shortest days of the year, with an average of 9.4h of daylight.

What is the average length of the day in December in Carbondale?

In December, the average length of the day in Carbondale is 9.4h.

How long on average sun shines in December in Carbondale?

In Carbondale, Colorado, the average sunshine in December is 6.5h.

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

Months with the lowest UV index in Carbondale are January through April, October through December, with an average maximum UV index of 2.

What is the UV index intensity in December in Carbondale?

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

Average temperature in December
Carbondale, CO

Average temperature in December - Carbondale, CO
  • Average high temperature in December: 29.8°F

The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 10.8°F

The month with the highest average low temperature is July (45.5°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

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Average pressure in December
Carbondale, CO

Average pressure in December - Carbondale, CO
  • Average pressure in December: 30.19"

The month with the highest atmospheric pressure is January (30.25").
The month with the lowest atmospheric pressure is May (29.94").

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Average wind speed in December
Carbondale, CO

Average wind speed in December - Carbondale, CO
  • Average wind speed in December: 4.2mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest months (with the lowest average wind speed) are January and December (4.2mph).

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Average humidity in December
Carbondale, CO

Average humidity in December - Carbondale, CO
  • Average humidity in December: 81%

Months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is June (47%).

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Average rainfall in December
Carbondale, CO

Average rainfall in December - Carbondale, CO
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is April (1.61").
The driest month (with the least rainfall) is September (0.35").

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Average rainfall days in December
Carbondale, CO

Average rainfall days in December - Carbondale, CO
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is April (13.3 days).
The month with the least rainy days is November (5.8 days).

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Average snowfall in December
Carbondale, CO

Average snowfall in December - Carbondale, CO
  • Average snowfall in December: 9.84"

The month with the highest snowfall is February (11.02").
Months with the least snowfall are July, August and September (0").

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Average snowfall days in December
Carbondale, CO

Average snowfall days in December - Carbondale, CO
  • Average snowfall days in December: 14.3 days

The month with the highest number of snowfall days is February (15.3 days).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Carbondale, 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: 6.5h

Months with the most sunshine are June and August (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 6.1h).

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Average sunshine days in December
Carbondale, CO

Average sunshine days in December - Carbondale, CO
  • Average sunshine days in December: 14.6 days

The month with the most sunshine days is June (21.9 days).
The month with the least sunshine days is February (10.7 days).

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Average UV index in December
Carbondale, CO

Average UV index in December - Carbondale, CO
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in December
Carbondale, CO

Average cloud cover in December - Carbondale, CO
  • Average cloud cover in December: 33

The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 12).

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Average visibility in December
Carbondale, CO

Average visibility in December - Carbondale, CO
  • Average visibility in December: 5mi

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

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