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
With the onset of December, Williamstown experiences a modest temperature adjustment, with the average high-temperature receding from 42.6°F (5.9°C) in November to a still wintry 32.7°F (0.4°C). During the nights of December, Williamstown maintains an almost steady temperature with an average low of 23.9°F (-4.5°C).Humidity
In December, the average relative humidity in Williamstown is 86%.Rainfall
In Williamstown, during December, the rain falls for 12 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Williamstown, during the entire year, the rain falls for 176.3 days and collects up to 37.09" (942mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Williamstown, in December, snow falls for 17.4 days, with typically accumulated 10.55" (268mm) of snow. Throughout the year, there are 88.5 snowfall days, and 46.89" (1191mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Williamstown.On the first day of December in Williamstown, sunrise is at 7:17 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:37 pm EST.
Sunshine
The average sunshine in December in Williamstown is 2.8h.UV index
The months with the lowest UV index in Williamstown are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Boost your sun resistance with garments that are densely woven yet spacious. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Williamstown?
What is the average humidity in December in Williamstown?
How many days does it rain in December in Williamstown?
How much does it snow in Williamstown in December?
What is the month with the shortest days in Williamstown?
How many hours of daylight does Williamstown have in December?
When is the sunrise / sunset in December in Williamstown?
How long on average sun shines in December in Williamstown?
What are the months with the lowest UV index in Williamstown?
How high is the UV index in December in Williamstown?
Average temperature in December
Williamstown, NY
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in December
Williamstown, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Williamstown, NY
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Williamstown, NY
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in December
Williamstown, NY
- Average rainfall in December: 3.43"
The wettest months (with the highest rainfall) are May and October (3.66").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Williamstown, NY
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is October (18.5 days).
The month with the least rainy days is February (8.5 days).
Average snowfall in December
Williamstown, NY
- Average snowfall in December: 10.55"
The month with the highest snowfall is January (11.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Williamstown, NY
- Average snowfall days in December: 17.4 days
The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Williamstown, NY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 2h and 30min).
Average sunshine days in December
Williamstown, NY
- Average sunshine days in December: 6.3 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (4.6 days).
Average UV index in December
Williamstown, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Williamstown, NY
- Average cloud cover in December: 72
The months with the most cloud cover are January and February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Williamstown, NY
- Average visibility in December: 5mi
The months with the highest visibility are April and October (6mi).
The months with the lowest visibility are January and February (4mi).
Williamstown, New York, USA
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