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
December weather in Rockport is marked by a drop in the average high-temperature, falling from a frosty 44.8°F (7.1°C) in November to a wintry 35.8°F (2.1°C). The nighttime temperature dips to a subzero cold 26.6°F (-3°C) on average during December.Humidity
In Rockport, Maine, the average relative humidity in December is 78%.Rainfall
The months with the most rainfall in Rockport are April, November and December, with an average 1.42" (36mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Rockport, during December, snow falls for 5.7 days and regularly aggregates up to 0.98" (25mm) of snow. In Rockport, during the entire year, snow falls for 32.6 days and aggregates up to 7.05" (179mm) of snow.Ocean temperature
In Rockport, the average seawater temperature in December is 45.1°F (7.3°C).Note: Dipping into 45.1°F (7.3°C) below 50°F (10°C) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 55.4°F (13°C) can be jarring.
Daylight
December has the shortest days of the year in Rockport, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 6:52 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 4:07 pm EST.
Sunshine
With an average of 4.6h of sunshine, December has the least sunshine of the year.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 low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Rockport?
What is the average humidity in December in Rockport?
What is the rainiest month in Rockport?
How much does it rain in Rockport in December?
How much does it snow in Rockport in December?
What is the water temperature in December in Rockport?
What is the month with the shortest days in Rockport?
How many hours of daylight does Rockport have in December?
When is the sunrise / sunset in December in Rockport?
What is the month with the least sunshine in Rockport?
How many hours of sunshine does Rockport have in December?
When is the lowest UV index in Rockport?
What is the UV index reading in December in Rockport?
Average temperature in December
Rockport, ME
- Average high temperature in December: 35.8°F
The warmest month (with the highest average high temperature) is August (70.7°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 26.6°F
The months with the highest average low temperature are July and August (59.4°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Rockport, 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
Rockport, ME
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).
Average humidity in December
Rockport, ME
- Average humidity in December: 78%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Rockport, ME
- Average rainfall in December: 1.42"
The wettest months (with the highest rainfall) are April, November and December (1.42").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in December
Rockport, ME
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is April (13.2 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall in December
Rockport, ME
- Average snowfall in December: 0.98"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Rockport, ME
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Rockport, 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
Rockport, ME
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 4min
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 36min).
Average sunshine days in December
Rockport, ME
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is April (13.8 days).
Average UV index in December
Rockport, 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
Rockport, 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
Rockport, 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).
Rockport, Maine, USA
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