December weather forecast
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 still a cold month in Cortez, Colorado, with temperature in the range of an average high of 37.2°F (2.9°C) and an average low of 21.7°F (-5.7°C).

Temperature

In December, the average high-temperature drops from a frosty 49.5°F (9.7°C) in November to a wintry 37.2°F (2.9°C). The average low-temperature, in December, is 21.7°F (-5.7°C).

Humidity

The average relative humidity in December is 67%.

Rainfall

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

Snowfall

Months with snowfall are January through April, October through December. In Cortez, in December, snow falls for 8.5 days, with typically accumulated 7.44" (189mm) of snow. Throughout the year, in Cortez, there are 34.4 snowfall days, and 29.29" (744mm) of snow is accumulated.

Daylight

The month with the shortest days in Cortez, Colorado, is December, with an average of 9h and 38min 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

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cortez. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Cortez?

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

What is the rainiest month in Cortez?

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

How much does it rain in Cortez in December?

In December, 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 38min of daylight.

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

In Cortez, Colorado, the average day length in December is 9h and 38min.

When are sunrise and sunset in December in Cortez?

On the first day of December in Cortez, Colorado, sunrise is at 7:10 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 is the month 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 long on average sun shines in December in Cortez?

In Cortez, the average sunshine duration in December 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.

What is the UV index intensity in December in Cortez?

The average daily maximum UV index in December in Cortez, Colorado, is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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 38min

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 38min).

  • Average sunshine in December: 6h and 30min

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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