Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The onset of December brings a small change in high-temperatures, falling from a frosty 46.9°F (8.3°C) in November to an icy 36°F (2.2°C). During December, the average low-temperature is recorded at a subzero cold 24.8°F (-4°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Williamsburg, during December, the rain falls for 10.1 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, there are 134.1 rainfall days, and 14.84" (377mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Williamsburg, in December, during 5.1 snowfall days, 1.3" (33mm) of snow is typically accumulated. In Williamsburg, during the entire year, snow falls for 28.6 days and aggregates up to 6.5" (165mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Williamsburg.On the first day of December in Williamsburg, sunrise is at 7:01 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:28 pm EST.
Sunshine
In December, the average sunshine is 4.9h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold is December in Williamsburg?
What is the average humidity in December in Williamsburg?
How many days does it rain in December in Williamsburg?
How much does it snow in Williamsburg in December?
What is the month with the shortest days in Williamsburg?
How many hours of daylight does Williamsburg have in December?
When is the sunrise / sunset in December in Williamsburg?
How long on average sun shines in December in Williamsburg?
What are the months with the lowest UV index in Williamsburg?
What is the UV index reading in December in Williamsburg?
Average temperature in December
Williamsburg, MA
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Williamsburg, MA
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Williamsburg, MA
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are January, February and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Williamsburg, MA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Williamsburg, MA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is October (1.61").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in December
Williamsburg, MA
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Williamsburg, MA
- Average snowfall in December: 1.3"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Williamsburg, MA
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (7.7 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, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Williamsburg, MA
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in December
Williamsburg, MA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Williamsburg, MA
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Williamsburg, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Williamsburg, Massachusetts, USA
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