December weather forecast
Cortez, CO

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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

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 to a chilly 37.2°F. 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

Arrival of December in Cortez comes with a reduction in the average high-temperature, falling from a chilly 49.5°F in November to an icy 37.2°F. An average nighttime temperature of 21.7°F is observed during December.

Humidity

The average relative humidity in December in Cortez is 67%.

Rainfall

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

Snowfall

January through April, October through December are months with snowfall. In Cortez, in December, snow falls for 8.5 days, with typically accumulated 7.44" of snow. Throughout the year, there are 34.4 snowfall days, and 29.29" of snow is accumulated.

Daylight

The month with the shortest days in Cortez is December, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:56 pm. On the last day of December, sunrise is at 7:28 am and sunset at 5:06 pm MST.

Sunshine

The months with the least sunshine in Cortez, Colorado, 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 of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translates 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 Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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FAQ

How cold is December in Cortez?

An average high-temperature, in December, in Cortez, is 37.2°F and the average low-temperature is 21.7°F. The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 80.6°F.

What is the average humidity in December in Cortez?

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

What is the rainiest month in Cortez?

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

How many days does it rain in December in Cortez?

In Cortez, during December, the rain falls for 7.5 days and regularly aggregates up to 1.26" of precipitation.

How many days does it snow in December in Cortez?

In Cortez, Colorado, in December, during 8.5 snowfall days, 7.44" of snow is typically accumulated.

What is the month with the shortest days in Cortez?

December has the shortest days of the year in Cortez, 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 in Cortez, Colorado, is 9h and 38min.

When is the sunrise / sunset in December in Cortez?

In December, on the first day of the month, sunrise is at 7:09 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:06 pm MST.

What are the months with the least sunshine in Cortez?

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

How many hours of sunshine does Cortez have in December?

In December, the average sunshine duration is 6.5h.

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

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

What is the UV index intensity in December in Cortez?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
49.5°F
37.2°F
35.1°F
Average low temperature
30.7°F
21.7°F
19.8°F
Average pressure
30.1"Hg
30.16"Hg
30.23"Hg
Average wind speed
6.5mph
5.9mph
5.7mph
Average max. wind speed
7.4mph
6.5mph
6.3mph
Average wind speed gusts
11.3mph
10.6mph
10.5mph
Average humidity
52%
67%
73%
Average rainfall
0.75"
1.26"
1.26"
Average rainfall days
5.4
7.5
6.1
Average snowfall
2.68"
7.44"
8.11"
Average snowfall days
3.1
8.5
8.5
Average daylight
10h 1min
9h 4min
9h 5min
Average sunshine
7h 2min
6h 3min
6h 3min
Average sunshine days
23.1
19
20.7
Average UV index
2
2
2
Average cloud cover
15%
27%
27%
Average visibility
6mi
6mi
6mi

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"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 - 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").
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 - 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 / 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 - 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

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 - 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 - 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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Cortez, Colorado, USA

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