December weather forecastMountain View, CO
December
Weather in December
The first month of the winter, December, is also an icy month in Mountain View, Colorado, with temperature in the range of an average high of 39.6°F (4.2°C) and an average low of 20.7°F (-6.3°C).Temperature
December, characterized by an average high temperature of 39.6°F (4.2°C) and a low temperature of 20.7°F (-6.3°C), is generally the coldest month.Humidity
In December, the average relative humidity is 61%.Rainfall
In Mountain View, in December, it is raining for 5.2 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, in Mountain View, there are 95 rainfall days, and 10.08" (256mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Mountain View. In December, it is snowing for 7.2 days. Throughout December, 3.82" (97mm) of snow is accumulated. Throughout the year, there are 40.9 snowfall days, and 32.17" (817mm) of snow is accumulated.Daylight
December has the shortest days of the year in Mountain View, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:36 pm. On the last day of December, in Mountain View, Colorado, sunrise is at 7:21 am and sunset at 4:45 pm MST.
Sunshine
The average sunshine in December in Mountain View 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 Mountain View. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 in December translates into these instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mountain View, CO
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest months (with the lowest average low temperature) are February and December (20.7°F).
Average pressure in December
Mountain View, 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
Mountain View, CO
- Average wind speed in December: 5.8mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is September (5.6mph).
Average humidity in December
Mountain View, CO
- Average humidity in December: 61%
The month with the highest relative humidity is February (66%).
The months with the lowest relative humidity are June and August (41%).
Average rainfall in December
Mountain View, CO
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in December
Mountain View, CO
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (3.3 days).
Average snowfall in December
Mountain View, CO
- Average snowfall in December: 3.82"
The month with the highest snowfall is February (5.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mountain View, CO
- Average snowfall days in December: 7.2 days
The month with the highest number of snowfall days is February (8.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Mountain View, 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 0min
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 48min).
Average sunshine days in December
Mountain View, CO
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is November (23.9 days).
The month with the least sunshine days is July (13.5 days).
Average UV index in December
Mountain View, 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
Mountain View, CO
- Average cloud cover in December: 21
The month with the most cloud cover is April (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in December
Mountain View, 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).
