December weather forecast
Aurora, CO

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Beautiful city lights and speedy car lights on the highway in Aurora City, Colorado
Beautiful city lights and speedy car lights on the highway in Aurora City, Colorado

Weather in December

December welcomes the winter season in Aurora, Colorado with temperatures dipping as low as 21.7°F (-5.7°C). Compared to November, December is significantly colder, marking the progression into the icy winter. Snowfall becomes a regular feature, ensuring a white Christmas for the residents. The month witnesses the shortest daylight hours of the year, ensuring long, cold nights. Despite the unfavorable conditions, the holiday spirit keeps the town buzzing, magnifying the beauty of the wintery landscapes.

Temperature

In Aurora, the lowest average temperatures are observed in December, with a high of 40.1°F (4.5°C) and a low of 21.7°F (-5.7°C).

Humidity

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

Rainfall

The month with the least rainfall in Aurora, Colorado, is December, when the rain falls for 4.4 days and typically collects 0.43" (11mm) of precipitation.

Snowfall

Months with snowfall in Aurora are January through May, October through December. In Aurora, Colorado, during December, snow falls for 7.8 days and regularly aggregates up to 2.91" (74mm) of snow. In Aurora, during the entire year, snow falls for 41.6 days and aggregates up to 27.95" (710mm) of snow.

Daylight

December has the shortest days of the year in Aurora, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:35 pm. On the last day of December, in Aurora, sunrise is at 7:20 am and sunset at 4:45 pm MST.

Sunshine

In December, the average sunshine in Aurora is 6.9h.

UV index

The months with the lowest UV index in Aurora are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 2 in December transforms into this advice:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year in Aurora?

December is the coldest month in Aurora, with the temperature often reaching an average high of 40.1°F (4.5°C) and an average low of 21.7°F (-5.7°C).

How cold is December in Aurora?

The average high-temperature, in December, in Aurora, is 40.1°F (4.5°C), while the average low-temperature is 21.7°F (-5.7°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is calculated to be 86°F (30°C).

What is the average humidity in December in Aurora?

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

What is the driest month in Aurora?

The month with the least rainfall is December, when the rain falls for 4.4 days and typically collects 0.43" (11mm) of precipitation.

How many days does it rain in December in Aurora?

In Aurora, Colorado, in December, it is raining for 4.4 days, with typically 0.43" (11mm) of accumulated precipitation.

How many days does it snow in December in Aurora?

In Aurora, Colorado, during December, snow falls for 7.8 days and regularly aggregates up to 2.91" (74mm) of snow.

What is the month with the shortest days in Aurora?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

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

In December, the average day length in Aurora is 9h and 25min.

When is the sunrise / sunset in December in Aurora?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:45 pm MST.

How long on average sun shines in December in Aurora?

In December, the average sunshine duration in Aurora, Colorado, is 6.9h.

When is the lowest UV index in Aurora?

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

How high is the UV index in December in Aurora?

In Aurora, Colorado, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Aurora, CO

Average temperature in December - Aurora, CO
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (40.1°F).

  • Average low temperature in December: 21.7°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is December (21.7°F).

Average pressure in December
Aurora, CO

Average pressure in December - Aurora, CO
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.9"Hg).

Average wind speed in December
Aurora, CO

Average wind speed in December - Aurora, CO
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are September and December (6.5mph).

Average humidity in December
Aurora, CO

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

The months with the highest relative humidity are January and February (64%).
The month with the lowest relative humidity is August (42%).

Average rainfall in December
Aurora, CO

Average rainfall in December - Aurora, CO
  • Average rainfall in December: 0.43"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.43").

Average rainfall days in December
Aurora, CO

Average rainfall days in December - Aurora, CO
  • Average rainfall days in December: 4.4 days

The month with the highest number of rainy days is July (14.1 days).
The month with the least rainy days is February (3 days).

Average snowfall in December
Aurora, CO

Average snowfall in December - Aurora, CO
  • Average snowfall in December: 2.91"

The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Aurora, CO

Average snowfall days in December - Aurora, CO
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is February (8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Aurora, CO
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 6h and 5min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

Average sunshine days in December
Aurora, CO

Average sunshine days in December - Aurora, CO
  • Average sunshine days in December: 21.8 days

The month with the most sunshine days is January (22.9 days).
The month with the least sunshine days is July (12.2 days).

Average UV index in December
Aurora, CO

Average UV index in December - Aurora, 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).

Average cloud cover in December
Aurora, CO

Average cloud cover in December - Aurora, CO
  • Average cloud cover in December: 23

The month with the most cloud cover is April (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 15).

Average visibility in December
Aurora, CO

Average visibility in December - Aurora, 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).

Aurora, Colorado, USA

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