December weather forecastSilverthorne, CO
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Silverthorne, Colorado, with an average temperature varying between 22.8°F (-5.1°C) and 1.6°F (-16.9°C).Temperature
In Silverthorne, December records the lowest average temperatures, peaking at 22.8°F (-5.1°C) and reaching a low of 1.6°F (-16.9°C).Humidity
In Silverthorne, the average relative humidity in December is 85%.Rainfall
In Silverthorne, during December, the rain falls for 5.1 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 102.1 rainfall days, and 17.17" (436mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall in Silverthorne. In Silverthorne, during December, snow falls for 17.6 days and regularly aggregates up to 9.72" (247mm) of snow. Throughout the year, in Silverthorne, there are 139.9 snowfall days, and 89.53" (2274mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:40 pm. On the last day of December, in Silverthorne, sunrise is at 7:24 am and sunset at 4:50 pm MST.
Sunshine
In Silverthorne, Colorado, the average sunshine in December is 5.7h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Enhance your sun protection with tightly woven, yet airy clothing. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Silverthorne, CO
- Average high temperature in December: 22.8°F
The warmest month (with the highest average high temperature) is July (67.6°F).
The month with the lowest average high temperature is December (22.8°F).
- Average low temperature in December: 1.6°F
The month with the highest average low temperature is July (39.7°F).
The coldest month (with the lowest average low temperature) is January (1.2°F).
Average pressure in December
Silverthorne, CO
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).
Average wind speed in December
Silverthorne, CO
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Silverthorne, CO
- Average humidity in December: 85%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (53%).
Average rainfall in December
Silverthorne, CO
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in December
Silverthorne, CO
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (3.6 days).
Average snowfall in December
Silverthorne, CO
- Average snowfall in December: 9.72"
The month with the highest snowfall is March (14.61").
The month with the least snowfall is August (0.24").
Average snowfall days in December
Silverthorne, CO
- Average snowfall days in December: 17.6 days
The month with the highest number of snowfall days is March (20.3 days).
The month with the least snowfall days is July (0.6 days).
Average daylight in December /
Average sunshine in December
Silverthorne, 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: 5h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in December
Silverthorne, CO
- Average sunshine days in December: 13 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (7.4 days).
Average UV index in December
Silverthorne, CO
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Silverthorne, CO
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in December
Silverthorne, CO
- Average visibility in December: 4mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
