December weather forecastDenver, CO
December
Weather in December
Denoting the arrival of winter, Denver's December weather signifies a significant transition from the mild autumn temperatures of November. The average high drops notably to 39.9°F (4.4°C), bringing back the winter chill. As the shortest daylight hours of the year take effect, December hosts diverse winter activities due to the 3.31" (84mm) of snowfall. Despite the winter conditions, Denver experiences unique weather characteristics, including the least annual rainfall amount. The city's weather in December facilitates an exceptional winter wonderland environment, making Denver a popular destination for holidays and end-of-year festivities.Temperature
In Denver, the lowest average temperatures are observed in December, with a high of 39.9°F (4.4°C) and a low 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 in Denver 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, during December, snow falls for 7 days and regularly aggregates up to 3.31" (84mm) of snow. In Denver, during the entire year, snow falls for 43.5 days and aggregates up to 35.67" (906mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:02 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:45 pm MST.
Sunshine
In December, the average sunshine is 7.1h.UV index
The 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 minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. It's recommended to limit sun exposure when its radiation is at its peak during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in December
Denver, CO
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).
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).
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: 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").
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).
Average snowfall in December
Denver, CO
- Average snowfall in December: 3.31"
The month with the highest snowfall is March (6.26").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Denver, CO
- Average daylight in December: 9h and 24min
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: 7h and 6min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).
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).
Average UV index in December
Denver, CO
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
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).
Average visibility in December
Denver, 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).
