Denver
Colorado, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Denver, CO

The colorful sky above the sunlit Denver city, Colorado in autumn, with a water body surrounded by trees, and majestic skyscrapers afar
The colorful sky above the sunlit Denver city, Colorado in autumn, with a water body surrounded by trees, and majestic skyscrapers afar
The first month of the winter, December, is still a cold month in Denver, Colorado, with temperature in the range of an average high of 39.9°F (4.4°C) and an average low of 20.7°F (-6.3°C).

Temperature

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

Humidity

The average relative humidity in December is 61%.

Rainfall

January and December are months with the least rain when the rain falls for 4.3 days and typically aggregates up to 0.39" (10mm) of rain.

Snowfall

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

In Denver, the average sunshine is 7.1h.

UV index

Months with the lowest UV index in Denver are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

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 in Denver, Colorado.

What is the temperature in December in Denver?

In December, in Denver, Colorado, 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, in December, it is raining for 4.3 days, with typically 0.39" (10mm) of accumulated 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, during 7 snowfall days, 3.31" (84mm) of snow is typically accumulated.

What is the month with the shortest days in Denver?

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

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 long on average sun shines in December in Denver?

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

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

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

What is the UV index reading in December in Denver?

In December, the average daily maximum UV index in Denver is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Denver, CO
  • Average high temperature in December: 4.4°C

The warmest month (with the highest average high temperature) is July (29.1°C).
The month with the lowest average high temperature is December (4.4°C).

  • Average low temperature in December: -6.3°C

The month with the highest average low temperature is July (15.1°C).
The coldest month (with the lowest average low temperature) is December (-6.3°C).

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%).

Average rainfall in December - Denver, CO
  • Average rainfall in December: 10mm

The wettest month (with the highest rainfall) is May (60mm).
Driest months (with the lowest rainfall) are January and December (10mm).

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 lowest number of rainy days is January (3.7 days).

Average snowfall in December - Denver, CO
  • Average snowfall in December: 84mm

The month with the highest snowfall is March (159mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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 lowest number of snowfall days are June, July and August (0 days).

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 shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 7.1h

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

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).