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
With December's onset, the weather reveals a slight temperature decrease, transitioning from a chilly 45.3°F (7.4°C) in November to an icy 36.7°F (2.6°C). Deer Isle marks an average drop to a subzero cold 27.7°F (-2.4°C) during nighttime in December, following the high of the day.Humidity
In Deer Isle, the average relative humidity in December is 78%.Rainfall
In December, in Deer Isle, the rain falls for 8.4 days. Throughout December, 1.89" (48mm) of precipitation is accumulated. Throughout the year, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Snowfall
Months with snowfall in Deer Isle are January through April, October through December. In December, it is snowing for 5.9 days. Throughout December, 1.81" (46mm) of snow is accumulated. In Deer Isle, Maine, during the entire year, snow falls for 29.2 days and aggregates up to 9.65" (245mm) of snow.Ocean temperature
In Deer Isle, in December, the average water temperature is 45.5°F (7.5°C).Note: Swimming in 45.5°F (7.5°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December in Deer Isle, sunrise is at 6:50 am and sunset at 3:57 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:05 pm EST.
Sunshine
The month with the least sunshine in Deer Isle is December, with an average of 4.5h 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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold is it in Deer Isle in December?
What is the average humidity in December in Deer Isle?
How many days does it rain in December in Deer Isle?
How much does it snow in Deer Isle in December?
What is the ocean temperature in December in Deer Isle?
What is the month with the shortest days in Deer Isle?
How many hours of daylight does Deer Isle have in December?
What time are sunrise and sunset in December in Deer Isle?
What is the month with the least sunshine in Deer Isle?
How many hours of sunshine does Deer Isle have in December?
What is the month with the lowest UV index in Deer Isle?
How high is the UV index in December in Deer Isle?
Average temperature in December
Deer Isle, ME
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is August (68.9°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Deer Isle, 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
Deer Isle, ME
- Average wind speed in December: 13.9mph
The windiest month (with the highest average wind speed) is January (14.4mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in December
Deer Isle, ME
- Average humidity in December: 78%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Deer Isle, ME
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in December
Deer Isle, ME
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Deer Isle, ME
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Deer Isle, ME
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Deer Isle, ME
- Average sea temperature in December: 45.6°F
The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).
Average daylight in December /
Average sunshine in December
Deer Isle, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in December
Deer Isle, ME
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is July (15.4 days).
Average UV index in December
Deer Isle, 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
Deer Isle, ME
- Average cloud cover in December: 51
The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Deer Isle, 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).
Deer Isle, Maine, USA
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