December weather forecastWestminster, CO
December
Weather in December
The first month of the winter, December, is still a cold month in Westminster, Colorado, with an average temperature ranging between max 41.2°F (5.1°C) and min 21.2°F (-6°C).Temperature
December tends to be the coldest month, with temperatures averaging a daily high of 41.2°F (5.1°C) and a low of 21.2°F (-6°C).Humidity
In Westminster, the average relative humidity in December is 60%.Rainfall
The months with the least rainfall in Westminster are January and December Rain falls for 4.4 days and accumulates 0.35" (9mm) of rain.Snowfall
Months with snowfall in Westminster are January through May, October through December. In Westminster, Colorado, during December, snow falls for 5.6 days and regularly aggregates up to 2.87" (73mm) of snow. Throughout the year, there are 40.4 snowfall days, and 31.3" (795mm) of snow is accumulated.Daylight
The month with the shortest days in Westminster is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:35 pm. On the last day of December, in Westminster, sunrise is at 7:21 am and sunset at 4:45 pm MST.
Sunshine
The average sunshine in December is 7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Westminster. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Westminster, CO
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 21.2°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).
Average pressure in December
Westminster, CO
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in December
Westminster, CO
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest months (with the lowest average wind speed) are August, September and December (5.8mph).
Average humidity in December
Westminster, CO
- Average humidity in December: 60%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (40%).
Average rainfall in December
Westminster, CO
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is May (2.05").
The driest months (with the least rainfall) are January and December (0.35").
Average rainfall days in December
Westminster, CO
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in December
Westminster, CO
- Average snowfall in December: 2.87"
The month with the highest snowfall is April (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Westminster, CO
- Average snowfall days in December: 5.6 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Westminster, CO
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 7h and 0min
The months with the most sunshine are June and July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in December
Westminster, CO
- Average sunshine days in December: 23.9 days
The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Westminster, 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
Westminster, CO
- Average cloud cover in December: 22
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
Westminster, 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).
