December weather forecast
Stonington, ME

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Weather in December

The first month of the winter, December, is also an icy month in Stonington, Maine, with an average temperature ranging between min 27.7°F (-2.4°C) and max 36.7°F (2.6°C).

Temperature

December's arrival comes with a mild decrease in the average high-temperature, moving subtly from a chilly 45.3°F (7.4°C) in November to a cold 36.7°F (2.6°C). Stonington's temperature during December nights registers a minor decrease to an average low of 27.7°F (-2.4°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Stonington, Maine, during December, the rain falls for 8.4 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Stonington, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Stonington, during December, snow falls for 5.9 days and regularly aggregates up to 1.81" (46mm) of snow. In Stonington, during the entire year, snow falls for 29.2 days and aggregates up to 9.65" (245mm) of snow.

Ocean temperature

In December, the average ocean temperature is 45.5°F (7.5°C).
Note: With the appropriate swimsuit, one can swim in 45.5°F (7.5°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

With an average of 8h and 54min of daylight, December has the shortest days of the year in Stonington.
On the first day of the month, sunrise is at 6:50 am and sunset at 3:57 pm. On the last day of December, sunrise is at 7:09 am and sunset at 4:06 pm EST.

Sunshine

With an average of 4.5h of sunshine, December has the least sunshine of the year in Stonington.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Stonington. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

How cold is December in Stonington?

An average high-temperature, in December, in Stonington, is 36.7°F (2.6°C) and the average low-temperature is 27.7°F (-2.4°C).

What is the average humidity in December in Stonington?

In Stonington, Maine, the average relative humidity in December is 78%.

How many days does it rain in December in Stonington?

In Stonington, Maine, in December, it is raining for 8.4 days, with typically 1.89" (48mm) of accumulated precipitation.

How many days does it snow in December in Stonington?

In Stonington, in December, snow falls for 5.9 days, with typically accumulated 1.81" (46mm) of snow.

What is the ocean temperature in December in Stonington?

In December, the average ocean temperature in Stonington is 45.5°F (7.5°C). Swimming in 45.5°F (7.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Stonington?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Stonington have in December?

The average day length in December in Stonington is 8h and 56min.

What time are sunrise and sunset in December in Stonington?

In December, on the first day of the month, sunrise is at 6:50 am and sunset at 3:57 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:06 pm EST.

What is the month with the least sunshine in Stonington?

December has the least sunshine of the year in Stonington, with an average of 4.5h of sunshine.

How long on average sun shines in December in Stonington?

In Stonington, the average sunshine duration in December is 4.5h.

When is the lowest UV index in Stonington?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in December in Stonington?

The average daily maximum UV index in December in Stonington is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Stonington, ME

Average temperature in December - Stonington, 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).

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Average pressure in December
Stonington, ME

Average pressure in December - Stonington, 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).

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Average wind speed in December
Stonington, ME

Average wind speed in December - Stonington, 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).

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Average humidity in December
Stonington, ME

Average humidity in December - Stonington, 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%).

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Average rainfall in December
Stonington, ME

Average rainfall in December - Stonington, 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").

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Average rainfall days in December
Stonington, ME

Average rainfall days in December - Stonington, 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).

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Average snowfall in December
Stonington, ME

Average snowfall in December - Stonington, 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").

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Average snowfall days in December
Stonington, ME

Average snowfall days in December - Stonington, 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).

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Average sea temperature in December
Stonington, ME

Average sea temperature in December - Stonington, 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).

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Average daylight in December /
Average sunshine in December
Stonington, ME

Average daylight in December / Average sunshine in December - Stonington, 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 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).

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Average sunshine days in December
Stonington, ME

Average sunshine days in December - Stonington, 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).

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Average UV index in December
Stonington, ME

Average UV index in December - Stonington, 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).

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Average cloud cover in December
Stonington, ME

Average cloud cover in December - Stonington, 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).

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Average visibility in December
Stonington, ME

Average visibility in December - Stonington, 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).

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Stonington, Maine, USA

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