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 aligns with a soft reduction in the average high-temperature, gently falling from a fresh 52.3°F (11.3°C) in November to a chilly 44.4°F (6.9°C). Chilmark upholds a consistent average temperature of 36.9°F (2.7°C) throughout the nights of December.Humidity
In December, the average relative humidity in Chilmark is 75%.Rainfall
In Chilmark, during December, the rain falls for 11.7 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Chilmark, during the entire year, the rain falls for 146.4 days and collects up to 25.47" (647mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 4.6 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, in Chilmark, there are 18.3 snowfall days, and 3.94" (100mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:50 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:23 pm EST.
Sunshine
In December, the average sunshine in Chilmark is 4.8h.UV index
The months with the lowest UV index in Chilmark are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold does it get in Chilmark in December?
What is the average humidity in December in Chilmark?
How much does it rain in Chilmark in December?
When does it start to snow in Chilmark?
What is the month with the shortest days in Chilmark?
How many hours of daylight does Chilmark have in December?
When is the sunrise / sunset in December in Chilmark?
How long on average sun shines in December in Chilmark?
What is the month with the lowest UV index in Chilmark?
What is the UV index intensity in December in Chilmark?
Average temperature in December
Chilmark, MA
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in December: 36.9°F
The month with the highest average low temperature is August (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in December
Chilmark, MA
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Chilmark, MA
- Average wind speed in December: 15.8mph
The windiest month (with the highest average wind speed) is January (16.2mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).
Average humidity in December
Chilmark, MA
- Average humidity in December: 75%
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
Chilmark, MA
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is October (3.07").
The driest months (with the least rainfall) are August and November (1.73").
Average rainfall days in December
Chilmark, MA
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is February (8.6 days).
Average snowfall in December
Chilmark, MA
- Average snowfall in December: 0.67"
The month with the highest snowfall is March (1.18").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Chilmark, MA
- Average snowfall days in December: 4.6 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Chilmark, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Chilmark, MA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is April (13.5 days).
Average UV index in December
Chilmark, MA
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Chilmark, MA
- Average cloud cover in December: 50
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Chilmark, MA
- 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).
Chilmark, Massachusetts, USA
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