December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

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

Weather in December

In December, the weather in Cortez enters the heart of winter, with temperatures plunging sharply in comparison to the previous month. The average high temperature in December goes down from November's 49.5°F (9.7°C) to a chilly 37.2°F (2.9°C). A transformative period, the cityscape quickly becomes a winter wonderland with substantial snowfall, making it a magical time to visit Cortez. Despite the cold, December, with its snow-covered beauty and holiday cheer, remains an enchanting period in the city.

Temperature

A shift in the average high-temperature occurs in December in Cortez, reducing from a frosty 49.5°F (9.7°C) in November to a cold 37.2°F (2.9°C). In December, the average low-temperature records at a subzero cold 21.7°F (-5.7°C) during the nights.

Humidity

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

Rainfall

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

Snowfall

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

Daylight

December has the shortest days of the year in Cortez, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:56 pm. On the last day of December, in Cortez, sunrise is at 7:28 am and sunset at 5:06 pm MST.

Sunshine

The months with the least sunshine are January and December, with an average of 6.5h of sunshine.

UV index

The months with the lowest UV index 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 threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.

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Frequently asked questions

How cold is it in Cortez in December?

During December, Cortez experiences an average high-temperature of 37.2°F (2.9°C) and a low-temperature of 21.7°F (-5.7°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is estimated at 80.6°F (27°C).

What is the average humidity in December in Cortez?

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

What is the wettest month in Cortez?

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

How much does it rain in Cortez in December?

In December, in Cortez, the rain falls for 7.5 days. Throughout December, 1.26" (32mm) of precipitation is accumulated.

How much does it snow in Cortez in December?

In Cortez, Colorado, 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 in Cortez is December, with an average of 9h and 36min of daylight.

How many hours of daylight does Cortez have in December?

The average day length in December is 9h and 38min.

When are sunrise and sunset in December in Cortez?

In December, on the first day of the month, sunrise is at 7:10 am and sunset at 4:56 pm. On the last day of the month, in Cortez, sunrise is at 7:28 am and sunset at 5:06 pm MST.

What is the month with the least sunshine in Cortez?

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

How long on average sun shines in December in Cortez?

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

When is the lowest UV index in Cortez?

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

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

49.5°F 9.7°C

37.2°F 2.9°C

35.1°F 1.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.4mph 11.9km/h

6.5mph 10.5km/h

6.3mph 10.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

23.1

20.7

Average UV index

Average cloud cover

15%

27%

Average visibility

6mi 9.7km

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: 30.16"Hg

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

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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: 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: 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: 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: 7.44"

The month with the highest snowfall is January (8.11").
The 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: 8.5 days

The months with the highest number of snowfall days are January and December (8.5 days).
The 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: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

Average sunshine in December: 6h and 3min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 6h and 30min).

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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: 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).

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Average cloud cover in December
Cortez, CO

Average cloud cover in December: 27

The 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: 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).

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December weather forecast
Cortez, CO

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