December weather forecastWilliamsburg, CO
December
Weather in December
December, the first month of the winter in Williamsburg, is also an icy month, with an average temperature fluctuating between 38.3°F (3.5°C) and 18.5°F (-7.5°C).Temperature
Welcoming December, Williamsburg observes a shift in the average high-temperature, falling from November's chilly 48.4°F (9.1°C) to a cold 38.3°F (3.5°C). During December, the temperature tends to dip to an average of 18.5°F (-7.5°C) at night.Humidity
In Williamsburg, the average relative humidity in December is 65%.Rainfall
In Williamsburg, in December, during 4 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Williamsburg, during the entire year, the rain falls for 108.6 days and collects up to 10.83" (275mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Williamsburg, during December, snow falls for 5.5 days and regularly aggregates up to 2.6" (66mm) of snow. In Williamsburg, Colorado, during the entire year, snow falls for 38 days and aggregates up to 23.94" (608mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:50 pm MST.
Sunshine
In December, the average sunshine is 7.2h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Williamsburg. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 2 translates into these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Observe! Snow reflection can nearly intensify 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
Williamsburg, CO
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in December
Williamsburg, CO
- Average pressure in December: 30.11"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
Williamsburg, CO
- Average wind speed in December: 7.4mph
The windiest months (with the highest average wind speed) are January, February and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Williamsburg, CO
- Average humidity in December: 65%
The months with the highest relative humidity are January and February (69%).
The month with the lowest relative humidity is June (40%).
Average rainfall in December
Williamsburg, CO
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is July (2.2").
The driest months (with the least rainfall) are January and November (0.31").
Average rainfall days in December
Williamsburg, CO
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in December
Williamsburg, CO
- Average snowfall in December: 2.6"
The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Williamsburg, CO
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Williamsburg, CO
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 7h and 12min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 7h and 0min).
Average sunshine days in December
Williamsburg, CO
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is November (24.7 days).
The month with the least sunshine days is July (4.7 days).
Average UV index in December
Williamsburg, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Williamsburg, CO
- Average cloud cover in December: 20
The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June, September, October and November (Cloud cover 14).
Average visibility in December
Williamsburg, 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).
