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
The transition into December involves a small decrease in the average high-temperature, dipping slightly from a chilly 48.7°F (9.3°C) in November to a wintry 40.5°F (4.7°C). December witnesses a minor deviation from daytime peaks, with an average nighttime temperature of 32.5°F (0.3°C).Humidity
The average relative humidity in December in Rockport is 75%.Rainfall
The month with the most rainfall in Rockport is December, when the rain falls for 11.4 days and typically aggregates up to 3.23" (82mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Rockport, during December, snow falls for 4.9 days and regularly aggregates up to 2.01" (51mm) of snow. Throughout the year, in Rockport, Massachusetts, there are 27.4 snowfall days, and 9.17" (233mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature in Rockport is 46°F (7.8°C).Note: With the appropriate swimsuit, one can swim in 46°F (7.8°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.
Daylight
The month with the shortest days in Rockport is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 6:53 am and sunset at 4:09 pm. On the last day of December, sunrise is at 7:12 am and sunset at 4:19 pm EST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.8h 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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
Is December cold in Rockport?
What is the average humidity in December in Rockport?
What is the wettest month in Rockport?
How many days does it rain in December in Rockport?
How many days does it snow in December in Rockport?
What is the ocean 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 are the months with the least sunshine in Rockport?
How long on average sun shines in December in Rockport?
When is the lowest UV index in Rockport?
What is the UV index intensity in December in Rockport?
Average temperature in December
Rockport, MA
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Rockport, 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 (29.92"Hg).
Average wind speed in December
Rockport, MA
- Average wind speed in December: 14.4mph
The windiest month (with the highest average wind speed) is January (15.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.9mph).
Average humidity in December
Rockport, MA
- Average humidity in December: 75%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Rockport, MA
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is December (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Rockport, MA
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in December
Rockport, MA
- Average snowfall in December: 2.01"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Rockport, MA
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Rockport, MA
- Average sea temperature in December: 45.9°F
The best month for swimming (with the highest average sea temperature) is August (66.4°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in December /
Average sunshine in December
Rockport, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 5min
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 48min).
Average sunshine days in December
Rockport, MA
- Average sunshine days in December: 15.1 days
The months with the most sunshine days are September and November (16.7 days).
The month with the least sunshine days is February (13.1 days).
Average UV index in December
Rockport, 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
Rockport, 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 27).
Average visibility in December
Rockport, 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).
Rockport, Massachusetts, USA
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