December weather forecast and climate
Cortez, CO

The bright and red rays of the setting sun over the scenic layout of hills and plains of Cortez, Colorado
The bright and red rays of the setting sun over the scenic layout of hills and plains of Cortez, Colorado

Weather in December

The first month of the winter, December, is also a wintry month in Cortez, Colorado, with average temperature varying between 37.2°F (2.9°C) and 21.7°F (-5.7°C).

Temperature

In Cortez, the average high-temperature decreases, from a frosty 49.5°F (9.7°C) in November, to a cold 37.2°F (2.9°C). In Cortez, the average low-temperature is 21.7°F (-5.7°C).

Humidity

The average relative humidity is 67%.

Rainfall

The wettest months are January and December, with an average 1.26" (32mm) of rainfall.

Snowfall

January through April, October through December are months with snowfall in Cortez. In December, it is snowing for 8.5 days. Throughout December, 7.44" (189mm) of snow is accumulated. In Cortez, during the entire year, snow falls for 34.4 days, and aggregates up to 29.29" (744mm) of snow.

Daylight

With an average of 9.6h of daylight, December has the shortest days of the year in Cortez.

Sunshine

Months with the least sunshine in Cortez, Colorado, are January and December, with an average of 6.5h of sunshine.

UV index

Months with the lowest UV index in Cortez are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Cortez?

In December, in Cortez, Colorado, the average high-temperature is 37.2°F (2.9°C), and the average low-temperature is 21.7°F (-5.7°C).

What is the average humidity in December in Cortez?

In Cortez, the average relative humidity in December is 67%.

How much does it rain in Cortez in December?

In Cortez, Colorado, in December, during 7.5 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

What is the rainiest month in Cortez?

The wettest months in Cortez are January and December, with an average 1.26" (32mm) of rainfall.

How many days does it snow in December in Cortez?

In Cortez, in December, snow falls for 8.5 days, with typically accumulated 7.44" (189mm) of snow.

What is the month with the shortest days in Cortez?

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

How many hours of daylight does Cortez have in December?

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

What is the month with the least sunshine in Cortez?

Months with the least sunshine in Cortez are January and December, with an average of 6.5h of sunshine.

How many hours of sunshine does Cortez have in December?

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

When is the lowest UV index in Cortez?

Months with the lowest UV index in Cortez are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Cortez?

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

Average temperature in December
Cortez, CO

Average temperature in December - Cortez, CO
  • Average high temperature in December: 37.2°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 21.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in December
Cortez, CO

Average pressure in December - Cortez, CO
  • Average pressure in December: 30.16"

The month with the highest atmospheric pressure is January (30.23").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in December
Cortez, CO

Average wind speed in December - Cortez, CO
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).

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Average humidity in December
Cortez, CO

Average humidity in December - Cortez, CO
  • Average humidity in December: 67%

The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is June (26%).

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Average rainfall in December
Cortez, CO

Average rainfall in December - Cortez, CO
  • Average rainfall in December: 1.26"

The wettest months (with the highest rainfall) are January and December (1.26").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in December
Cortez, CO

Average rainfall days in December - Cortez, CO
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is June (2.8 days).

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Average snowfall in December
Cortez, CO

Average snowfall in December - Cortez, CO
  • Average snowfall in December: 7.44"

The month with the highest snowfall is January (8.11").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Cortez, CO

Average snowfall days in December - Cortez, CO
  • Average snowfall days in December: 8.5 days

Months with the highest number of snowfall days are January and December (8.5 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the most sunshine is June (Average sunshine: 12.1h).
Months with the least sunshine are January and December (Average sunshine: 6.5).

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Average sunshine days in December
Cortez, CO

Average sunshine days in December - Cortez, CO
  • Average sunshine days in December: 19 days

The month with the most sunshine days is June (26.2 days).
The month with the least sunshine days is February (17.6 days).

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Average UV index in December
Cortez, CO

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

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

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Average cloud cover in December
Cortez, CO

Average cloud cover in December - Cortez, CO
  • Average cloud cover in December: 27

Months with the most cloud cover are January and December (Cloud cover 27).
The month with the least cloud cover is June (Cloud cover 9).

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Average visibility in December
Cortez, CO

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

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

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