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 sea temperature 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
Plymouth's transition into December involves a gentle shift in temperature, receding from a fresh 50.7°F (10.4°C) in November to an icy 41.9°F (5.5°C). Plymouth observes a slightly reduced average nighttime temperature of 32.9°F (0.5°C) during December.Humidity
In Plymouth, the average relative humidity in December is 76%.Rainfall
In Plymouth, in December, during 9.8 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 132.2 rainfall days, and 16.3" (414mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Plymouth. In December, in Plymouth, it is snowing for 4 days. Throughout December, 1.02" (26mm) of snow is accumulated. Throughout the year, in Plymouth, Massachusetts, there are 23.3 snowfall days, and 5.87" (149mm) of snow is accumulated.Ocean temperature
In Plymouth, in December, the average water temperature is 46.9°F (8.3°C).Note: Taking a dip in 46.9°F (8.3°C) can be perilous. Submersion in temperatures under 50°F (10°C) triggers severe cold shock accompanied by hyperventilation.
Daylight
December has the shortest days of the year in Plymouth, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:51 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:21 pm EST.
Sunshine
The months with the least sunshine in Plymouth are February and December, with an average of 4.7h of sunshine.UV index
The months with the lowest UV index in Plymouth 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 unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
How cold does it get in Plymouth in December?
What is the average humidity in December in Plymouth?
How many days does it rain in December in Plymouth?
How many days does it snow in December in Plymouth?
What is the ocean temperature in December in Plymouth?
What is the month with the shortest days in Plymouth?
How many hours of daylight does Plymouth have in December?
When is the sunrise / sunset in December in Plymouth?
What are the months with the least sunshine in Plymouth?
How long on average sun shines in December in Plymouth?
What is the month with the lowest UV index in Plymouth?
What is the UV index reading in December in Plymouth?
Average temperature in December
Plymouth, MA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Plymouth, 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
Plymouth, MA
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is January (12.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in December
Plymouth, MA
- Average humidity in December: 76%
The month with the highest relative humidity is July (80%).
The months with the lowest relative humidity are March, April and November (74%).
Average rainfall in December
Plymouth, MA
- Average rainfall in December: 1.54"
The wettest months (with the highest rainfall) are July and October (1.65").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in December
Plymouth, MA
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Plymouth, MA
- Average snowfall in December: 1.02"
The month with the highest snowfall is March (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Plymouth, MA
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Plymouth, MA
- Average sea temperature in December: 46.9°F
The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).
Average daylight in December /
Average sunshine in December
Plymouth, 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 12min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in December
Plymouth, MA
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in December
Plymouth, MA
- Average UV index in December: 2
The months with the highest UV index are June, 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
Plymouth, MA
- Average cloud cover in December: 48
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Plymouth, 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).
Plymouth, Massachusetts, USA
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