December weather forecast and climate
Denver, CO

The colorful sky above the sunlit Denver city, Colorado in autumn
The colorful sky above the sunlit Denver city, Colorado in autumn

Weather in December

December, the first month of the winter, in Denver, is still a cold month, with average temperature fluctuating between 20.7°F (-6.3°C) and 39.9°F (4.4°C).

Temperature

With an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 20.7°F (-6.3°C), December is the coldest month.

Humidity

In Denver, Colorado, the average relative humidity is 61%.

Rainfall

Months with the least rainfall in Denver, Colorado, are January and December Rain falls for 4.3 days and accumulates 0.39" (10mm) of rain.

Snowfall

Months with snowfall in Denver are January through May, October through December. In Denver, during December, snow falls for 7 days and regularly aggregates up to 3.31" (84mm) of snow. Throughout the year, in Denver, there are 43.5 snowfall days, and 35.67" (906mm) of snow is accumulated.

Daylight

The month with the shortest days in Denver is December, with an average of 9.4h of daylight.

Sunshine

The average sunshine in Denver is 7.1h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. 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 coldest month in Denver?

With an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 20.7°F (-6.3°C), December is the coldest month.

What is the temperature in December in Denver?

In December, the average high-temperature is 39.9°F (4.4°C), and the average low-temperature is 20.7°F (-6.3°C).

What is the average humidity in December in Denver?

In December, the average relative humidity in Denver, Colorado, is 61%.

How much does it rain in Denver in December?

In Denver, Colorado, during December, the rain falls for 4.3 days and regularly aggregates up to 0.39" (10mm) of precipitation.

What is the driest month in Denver?

Months with the least rainfall in Denver, Colorado, are January and December Rain falls for 4.3 days and accumulates 0.39" (10mm) of rain.

How much does it snow in Denver in December?

In Denver, Colorado, in December, snow falls for 7 days, with typically accumulated 3.31" (84mm) of snow.

What is the month with the shortest days in Denver?

With an average of 9.4h of daylight, December has the shortest days of the year in Denver, Colorado.

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

In Denver, Colorado, the average length of the day in December is 9.4h.

How many hours of sunshine does Denver have in December?

In Denver, Colorado, the average sunshine in December is 7.1h.

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

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

How high is the UV index in December in Denver?

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

Average temperature in December
Denver, CO

Average temperature in December - Denver, CO
  • Average high temperature in December: 39.9°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (39.9°F).

  • Average low temperature in December: 20.7°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

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Average pressure in December
Denver, CO

Average pressure in December - Denver, CO
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is April (29.91").

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Average wind speed in December
Denver, CO

Average wind speed in December - Denver, CO
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.7mph).

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Average humidity in December
Denver, CO

Average humidity in December - Denver, CO
  • Average humidity in December: 61%

The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is June (41%).

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Average rainfall in December
Denver, CO

Average rainfall in December - Denver, CO
  • Average rainfall in December: 0.39"

The wettest month (with the highest rainfall) is May (2.36").
The driest months (with the least rainfall) are January and December (0.39").

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Average rainfall days in December
Denver, CO

Average rainfall days in December - Denver, CO
  • Average rainfall days in December: 4.3 days

The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall in December
Denver, CO

Average snowfall in December - Denver, CO
  • Average snowfall in December: 3.31"

The month with the highest snowfall is March (6.26").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Denver, CO

Average snowfall days in December - Denver, CO
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is February (9.3 days).
Months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Denver, CO
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 7.1h

Months with the most sunshine are June, July and August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.9h).

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Average sunshine days in December
Denver, CO

Average sunshine days in December - Denver, CO
  • Average sunshine days in December: 22.4 days

The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (5.6 days).

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Average UV index in December
Denver, CO

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

Months with the highest UV index are June and July (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
Denver, CO

Average cloud cover in December - Denver, CO
  • Average cloud cover in December: 21

The month with the most cloud cover is April (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 15).

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Average visibility in December
Denver, CO

Average visibility in December - Denver, 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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