December weather forecast and climate
Alamosa, CO

A vast field near the iconic dune field in Alamosa, Colorado, with a back view of the vast brown sandy dune hotbed and distant mountain ranges
A vast field near the iconic dune field in Alamosa, Colorado, with a back view of the vast brown sandy dune hotbed and distant mountain ranges

Weather in December

The first month of the winter, December, is also a wintry month in Alamosa, Colorado, with temperature in the range of an average high of 33.8°F (1°C) and an average low of 15.4°F (-9.2°C).

Temperature

In December, the average high-temperature decreases, from a frosty 46.2°F (7.9°C) in November, to a cold 33.8°F (1°C). In Alamosa, in December, the average low-temperature is 15.4°F (-9.2°C).

Humidity

In Alamosa, the average relative humidity is 71%.

Rainfall

November and December are months with the least rain when the rain falls for 4.4 days and typically aggregates up to 0.31" (8mm) of rain.

Snowfall

January through May, October through December are months with snowfall. In Alamosa, during 6.8 snowfall days, 2.48" (63mm) of snow is typically accumulated. Throughout the year, in Alamosa, there are 37 snowfall days, and 20.08" (510mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.6h of daylight.

Sunshine

In December, the average sunshine in Alamosa is 7h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Alamosa?

In Alamosa, Colorado, the average relative humidity in December is 71%.

What is the driest month in Alamosa?

November and December are months with the least rain in Alamosa when the rain falls for 4.4 days and typically aggregates up to 0.31" (8mm) of rain.

How much does it rain in Alamosa in December?

In December, in Alamosa, the rain falls for 4.4 days. Throughout December, 0.31" (8mm) of precipitation is accumulated.

How much does it snow in Alamosa in December?

In Alamosa, in December, snow falls for 6.8 days, with typically accumulated 2.48" (63mm) of snow.

What is the month with the shortest days in Alamosa?

The month with the shortest days in Alamosa is December, with an average of 9.6h of daylight.

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

The average length of the day in December is 9.6h.

How long on average sun shines in December in Alamosa?

In Alamosa, Colorado, the average sunshine in December is 7h.

When is the lowest UV index in Alamosa?

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

What is the UV index intensity in December in Alamosa?

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

Average temperature in December
Alamosa, CO

Average temperature in December - Alamosa, CO
  • Average high temperature in December: 33.8°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.3°F).

  • Average low temperature in December: 15.4°F

The month with the highest average low temperature is July (50.5°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).

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Average pressure in December
Alamosa, CO

Average pressure in December - Alamosa, CO
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is April (29.91").

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Average wind speed in December
Alamosa, CO

Average wind speed in December - Alamosa, CO
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in December
Alamosa, CO

Average humidity in December - Alamosa, CO
  • Average humidity in December: 71%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is June (37%).

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Average rainfall in December
Alamosa, CO

Average rainfall in December - Alamosa, CO
  • Average rainfall in December: 0.31"

The wettest month (with the highest rainfall) is July (1.18").
The driest months (with the least rainfall) are November and December (0.31").

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Average rainfall days in December
Alamosa, CO

Average rainfall days in December - Alamosa, CO
  • Average rainfall days in December: 4.4 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is November (2.1 days).

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Average snowfall in December
Alamosa, CO

Average snowfall in December - Alamosa, CO
  • Average snowfall in December: 2.48"

Months with the highest snowfall are January and March (3.5").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Alamosa, CO

Average snowfall days in December - Alamosa, CO
  • Average snowfall days in December: 6.8 days

The month with the highest number of snowfall days is February (7.2 days).
Months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Alamosa, CO
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 7h

The month with the most sunshine is June (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 6.8h).

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Average sunshine days in December
Alamosa, CO

Average sunshine days in December - Alamosa, CO
  • Average sunshine days in December: 23.3 days

The month with the most sunshine days is November (25.8 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in December
Alamosa, CO

Average UV index in December - Alamosa, 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, October, November and December (UV index 2).

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Average cloud cover in December
Alamosa, CO

Average cloud cover in December - Alamosa, CO
  • Average cloud cover in December: 22

Months with the most cloud cover are January and February (Cloud cover 25).
Months with the least cloud cover are June, September and October (Cloud cover 12).

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Average visibility in December
Alamosa, CO

Average visibility in December - Alamosa, CO
  • Average visibility in December: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January and February (5mi).

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