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 results in a small decrease in the average high-temperature, moderately receding from a cool 51.3°F (10.7°C) in November to a frosty 43.7°F (6.5°C). West Yarmouth's December nights observe a minor shift from the daytime temperatures, resulting in an average dip to a cold 36.9°F (2.7°C).Humidity
In West Yarmouth, Massachusetts, the average relative humidity in December is 75%.Rainfall
In West Yarmouth, Massachusetts, in December, during 10.8 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 129 rainfall days, and 14.21" (361mm) of precipitation is accumulated.Snowfall
January through April and December are months with snowfall. December is the first month it typically snows in West Yarmouth. Throughout December, in the average 4.5 snowfall days, it receives 0.39" (10mm) of snow. Throughout the year, there are 20.8 snowfall days, and 2.6" (66mm) 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 in West Yarmouth, sunrise is at 6:48 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 4:20 pm EST.
Sunshine
The months with the least sunshine in West Yarmouth are February and December, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is December in West Yarmouth?
What is the average humidity in December in West Yarmouth?
How much does it rain in West Yarmouth in December?
When does it start snowing in West Yarmouth?
What is the month with the shortest days in West Yarmouth?
How many hours of daylight does West Yarmouth have in December?
What time are sunrise and sunset in December in West Yarmouth?
What is the month with the least sunshine in West Yarmouth?
How long on average sun shines in December in West Yarmouth?
What is the month with the lowest UV index in West Yarmouth?
How high is the UV index in December in West Yarmouth?
Average temperature in December
West Yarmouth, MA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in December: 36.9°F
The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in December
West Yarmouth, 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 (29.93"Hg).
Average wind speed in December
West Yarmouth, MA
- Average wind speed in December: 16.4mph
The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).
Average humidity in December
West Yarmouth, MA
- Average humidity in December: 75%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
West Yarmouth, MA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days in December
West Yarmouth, MA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in December
West Yarmouth, MA
- Average snowfall in December: 0.39"
The month with the highest snowfall is January (0.87").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in December
West Yarmouth, MA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (6.4 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
West Yarmouth, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in December
West Yarmouth, MA
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).
Average UV index in December
West Yarmouth, 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
West Yarmouth, MA
- Average cloud cover in December: 51
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
West Yarmouth, 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).
West Yarmouth, Massachusetts, USA
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