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
Swampscott's December weather features a mild decline in high-temperatures, reducing from a frosty 49.5°F (9.7°C) in November to a wintry 39.9°F (4.4°C). Swampscott's nighttime temperature in December drops to an average of 30.2°F (-1°C).Humidity
In Swampscott, the average relative humidity in December is 76%.Rainfall
December is the month with the most rainfall. Rain falls for 10.3 days and accumulates 2.99" (76mm) of precipitation.Snowfall
Months with snowfall in Swampscott are January through April, October through December. In Swampscott, during December, snow falls for 5.3 days and regularly aggregates up to 3.43" (87mm) of snow. In Swampscott, during the entire year, snow falls for 29.9 days and aggregates up to 15.59" (396mm) of snow.Ocean temperature
In Swampscott, Massachusetts, the average seawater temperature in December is 46.2°F (7.9°C).Note: Engaging in a swim in 46.2°F (7.9°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 6:54 am and sunset at 4:11 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:20 pm EST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.6h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Swampscott, Massachusetts. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
How cold is it in Swampscott in December?
What is the average humidity in December in Swampscott?
What is the wettest month in Swampscott?
How much does it rain in Swampscott in December?
How much does it snow in Swampscott in December?
What is the water temperature in December in Swampscott?
What is the month with the shortest days in Swampscott?
What is the average length of the day in December in Swampscott?
When are sunrise and sunset in December in Swampscott?
What is the month with the least sunshine in Swampscott?
How many hours of sunshine does Swampscott have in December?
What is the month with the lowest UV index in Swampscott?
How high is the UV index in December in Swampscott?
Average temperature in December
Swampscott, MA
- Average high temperature in December: 39.9°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Swampscott, 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
Swampscott, MA
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Swampscott, MA
- Average humidity in December: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Swampscott, MA
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is December (2.99").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Swampscott, MA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Swampscott, MA
- Average snowfall in December: 3.43"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Swampscott, MA
- Average snowfall days in December: 5.3 days
The months with the highest number of snowfall days are January and February (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Swampscott, MA
- Average sea temperature in December: 46.3°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in December /
Average sunshine in December
Swampscott, 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 6min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Swampscott, MA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in December
Swampscott, 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
Swampscott, MA
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Swampscott, 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).
Swampscott, Massachusetts, USA
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