December weather forecast
Arriba, CO

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Weather in December

The first month of the winter, December, is also a wintry month in Arriba, Colorado, with an average temperature varying between 39°F (3.9°C) and 22.3°F (-5.4°C).

Temperature

Arriba experiences its lowest temperatures in December, with an average peak of 39°F (3.9°C) and a low of 22.3°F (-5.4°C).

Humidity

In December, the average relative humidity is 60%.

Rainfall

December is the month with the least rainfall in Arriba. Rain falls for 2.5 days and accumulates 0.2" (5mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Arriba, in December, during 3.5 snowfall days, 0.75" (19mm) of snow is typically accumulated. Throughout the year, there are 26.7 snowfall days, and 9.02" (229mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December in Arriba, Colorado, sunrise is at 6:54 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:40 pm MST.

Sunshine

In December, the average sunshine in Arriba is 6.8h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Arriba, Colorado. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, an average UV index of 2 transforms into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Arriba?

Arriba's coldest month, December, registers temperatures that range from a high of 39°F (3.9°C) to a low of 22.3°F (-5.4°C).

How cold does it get in Arriba in December?

An average high-temperature, in December, in Arriba, is 39°F (3.9°C) and the average low-temperature is 22.3°F (-5.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Arriba?

In Arriba, Colorado, the average relative humidity in December is 60%.

What is the driest month in Arriba?

The month with the least rainfall is December, when the rain falls for 2.5 days and typically collects 0.2" (5mm) of precipitation.

How much does it rain in Arriba in December?

In Arriba, in December, during 2.5 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

How many days does it snow in December in Arriba?

In December, it is snowing for 3.5 days. Throughout December, 0.75" (19mm) of snow is accumulated.

What is the month with the shortest days in Arriba?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Arriba have in December?

In December, the average day length in Arriba, Colorado, is 9h and 28min.

When are sunrise and sunset in December in Arriba?

In December, on the first day of the month, sunrise is at 6:54 am and sunset at 4:30 pm. On the last day of the month, in Arriba, sunrise is at 7:12 am and sunset at 4:40 pm MST.

How many hours of sunshine does Arriba have in December?

In December, the average sunshine duration is 6.8h.

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

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

What is the UV index reading in December in Arriba?

The average daily maximum UV index in December in Arriba is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
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
Arriba, CO

Average temperature in December - Arriba, CO
  • Average high temperature in December: 39°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (39°F).

  • Average low temperature in December: 22.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).

Average pressure in December
Arriba, CO

Average pressure in December - Arriba, CO
  • Average pressure in December: 30.09"Hg

The months with the highest atmospheric pressure are January and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Arriba, CO

Average wind speed in December - Arriba, CO
  • Average wind speed in December: 9.7mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).

Average humidity in December
Arriba, CO

Average humidity in December - Arriba, CO
  • Average humidity in December: 60%

The month with the highest relative humidity is February (63%).
The months with the lowest relative humidity are June and September (46%).

Average rainfall in December
Arriba, CO

Average rainfall in December - Arriba, CO
  • Average rainfall in December: 0.2"

The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.2").

Average rainfall days in December
Arriba, CO

Average rainfall days in December - Arriba, CO
  • Average rainfall days in December: 2.5 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (1.7 days).

Average snowfall in December
Arriba, CO

Average snowfall in December - Arriba, CO
  • Average snowfall in December: 0.75"

The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Arriba, CO

Average snowfall days in December - Arriba, CO
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 6h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).

Average sunshine days in December
Arriba, CO

Average sunshine days in December - Arriba, 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 (13.4 days).

Average UV index in December
Arriba, CO

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Arriba, CO

Average cloud cover in December - Arriba, CO
  • Average cloud cover in December: 25

The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).

Average visibility in December
Arriba, CO

Average visibility in December - Arriba, 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).

Arriba, Colorado, USA

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