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 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 shift from November to December involves a decrease in the average high-temperature, from a chilly 44.8°F (7.1°C) to a wintry 35.1°F (1.7°C). Swans Island, in December, experiences an average temperature of 25.7°F (-3.5°C) at night.Humidity
In December, the average relative humidity is 78%.Rainfall
The month with the most rainfall in Swans Island is December, when the rain falls for 11.5 days and typically aggregates up to 3.94" (100mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Swans Island, in December, during 7.9 snowfall days, 3.78" (96mm) of snow is typically accumulated. In Swans Island, Maine, during the entire year, snow falls for 48.1 days and aggregates up to 23.82" (605mm) of snow.Daylight
December has the shortest days of the year in Swans Island, Maine, with an average of 8h and 54min of daylight.On the first day of December in Swans Island, sunrise is at 6:49 am and sunset at 3:56 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:05 pm EST.
Sunshine
In December, the average sunshine is 4.4h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Swans Island. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
How cold is December in Swans Island?
What is the average humidity in December in Swans Island?
What is the rainiest month in Swans Island?
How much does it rain in Swans Island in December?
How much does it snow in Swans Island in December?
What is the month with the shortest days in Swans Island?
What is the average length of the day in December in Swans Island?
What time are sunrise and sunset in December in Swans Island?
How long on average sun shines in December in Swans Island?
When is the lowest UV index in Swans Island?
How high is the UV index in December in Swans Island?
Average temperature in December
Swans Island, ME
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Swans Island, ME
- Average pressure in December: 29.99"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
Swans Island, ME
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Swans Island, ME
- Average humidity in December: 78%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Swans Island, ME
- Average rainfall in December: 3.94"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (1.57").
Average rainfall days in December
Swans Island, ME
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in December
Swans Island, ME
- Average snowfall in December: 3.78"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Swans Island, ME
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Swans Island, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Swans Island, ME
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is August (18.7 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in December
Swans Island, 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
Swans Island, ME
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in December
Swans Island, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Swans Island, Maine, USA
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