Denver Weather in December

December is the coldest month for Denver, Colorado. That means temperatures below 0 degrees Fahrenheit (-18 °C) are possible for a few nights.

This page gives detailed information on the typical December temperature, precipitation, snow, sun, humidity, wind and storms for Denver. The numbers here are historical averages based on climate data gathered in the Denver community of Stapleton.

Temperature Weather iconTemperature

46 °F December average high 8 °C
18 °F December average low -8 °C

Denver's coldest days of the year usually occur from December 14th to 28th when the daily maximum temperature averages 45 degrees Fahrenheit (7 degrees Celsius) and the minimum averages 17 °F (-9 °C).

13 days 50 °F max. or more (10 °C)
18 days 20 °F min. or less (-8 °C)

Denver averages 4 days in December when the thermometer reaches into the 60s °F (over 16 °C). Typically on 5 days the mercury remains below freezing for the entire day.

The thermometer dips to 0 °F (-18 °C) or below on an average of one to two nights during December.

Rainy Weather iconPrecipitation

0.5 in total precipitation 12 mm
5 days of rain or snowfall

Half the time, Denver receives 0.2 to 0.7 inches (5 to 17 mm) of precipitation in December. One in four years has drier weather, while another one in four is wetter.

Snowy Weather iconSnow

6.6 in total snowfall 17 cm
5 days with new snow

December's snowfall varies a lot from year to year in Denver. Between 2.5 and 9 inches (6 to 27 cm) of fresh snow arrives in half the years. Less new snow lands in one out of four Decembers, while another twenty-five percent are snowier.

Denver typically has at least an inch (2.5 cm) of snow on the ground for 10 days this month. The snow normally accumulates to 5 inches (13 cm) or deeper on 1 day.

Sunny Weather iconSun

67 % sunshine
11 days clear skies

The sun's rays reach the ground in Denver during 67 percent of daylight hours on average in December, for a total of 196 hours in the month. Typically on 11 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in December at Denver averages 9 hours and 24 minutes a day. The shortest days of the year, on around December 21st and 22nd, last 9 hours and 21 minutes from sunrise to sunset.

Humid Weather iconHumidity

57 % December average humidity

The relative humidity in Denver during December usually peaks at 65 percent in the morning then drops to 39 percent by early afternoon. December is Denver's most humid month.

Local Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 65 65 63 45 39 51 61 64

Windy Weather iconWind

8.4 mph December wind speed average 13.5 kph

December is a little less windy than most other months in Denver.

Stormy Weather iconStorms

2 days snowfall of 1 inch (2.5 cm) or more
0 days with thunderstorms in December

About once a decade, a December snowstorm blankets Denver with ten inches (25 cm) or more of snow in one day.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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