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
Rockland, Maine, in December undergoes a slight reduction in the average high-temperature, shifting from November's frosty 45.5°F (7.5°C) to a wintry 37°F (2.8°C). December's average low temperature is a freezing cold 28.4°F (-2°C), displaying a subtle drop from its daily peak.Humidity
The average relative humidity in December is 77%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.35" (85mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Rockland, Maine, during December, snow falls for 6.5 days and regularly aggregates up to 1.81" (46mm) of snow. Throughout the year, there are 33.1 snowfall days, and 12.36" (314mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature in Rockland, Maine, is 45.1°F (7.3°C).Note: Being in 45.1°F (7.3°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.
Daylight
December has the shortest days of the year in Rockland, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 3:59 pm. On the last day of December, in Rockland, sunrise is at 7:11 am and sunset at 4:08 pm EST.
Sunshine
With an average of 4.5h of sunshine, December has the least sunshine of the year in Rockland.UV index
The months with the lowest UV index in Rockland are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Rockland in December?
What is the average humidity in December in Rockland?
What is the rainiest month in Rockland?
How many days does it rain in December in Rockland?
How much does it snow in Rockland in December?
What is the ocean temperature in December in Rockland?
What is the month with the shortest days in Rockland?
How many hours of daylight does Rockland have in December?
What time are sunrise and sunset in December in Rockland?
What is the month with the least sunshine in Rockland?
How many hours of sunshine does Rockland have in December?
What are the months with the lowest UV index in Rockland?
How high is the UV index in December in Rockland?
Average temperature in December
Rockland, ME
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is August (60.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in December
Rockland, ME
- Average pressure in December: 30"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Rockland, ME
- Average wind speed in December: 14.4mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity in December
Rockland, ME
- Average humidity in December: 77%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).
Average rainfall in December
Rockland, ME
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Rockland, ME
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Rockland, ME
- Average snowfall in December: 1.81"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Rockland, ME
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Rockland, ME
- Average sea temperature in December: 45°F
The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).
Average daylight in December /
Average sunshine in December
Rockland, ME
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in December
Rockland, ME
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.5 days).
Average UV index in December
Rockland, ME
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Rockland, ME
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Rockland, ME
- 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).
Rockland, Maine, USA
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