December weather forecast
Port Clyde, ME

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Weather in December

The first month of the winter, December, is still a cold month in Port Clyde, Maine, with an average temperature varying between 37°F (2.8°C) and 28.4°F (-2°C).

Temperature

As December arrives, Port Clyde's weather displays a minor decrease in high-temperatures, transitioning from November's frosty 45.5°F (7.5°C) to a wintry 37°F (2.8°C). A minor drop in temperature is observed from daytime highs during the nights of December, averaging a freezing cold 28.4°F (-2°C).

Humidity

The average relative humidity in December is 77%.

Rainfall

The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.35" (85mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 6.5 days. Throughout December, 1.81" (46mm) of snow is accumulated. Throughout the year, there are 33.1 snowfall days, and 12.36" (314mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:52 am and sunset at 4:00 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 4:09 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 4.5h 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 Port Clyde. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Updated: Jun 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

Port Clyde in December has an average high-temperature of 37°F (2.8°C) and an average low-temperature of 28.4°F (-2°C).

What is the average humidity in December?

The average relative humidity in December is 77%.

What is the wettest month?

December is the month with the most rainfall. Rain falls for 11.3 days and accumulates 3.35" (85mm) of precipitation.

How many days does it rain in December?

In Port Clyde, in December, during 11.3 rainfall days, 3.35" (85mm) of precipitation is typically accumulated.

How many days does it snow in December in Port Clyde?

In Port Clyde, in December, snow falls for 6.5 days, with typically accumulated 1.81" (46mm) of snow.

What is the month with the shortest days in Port Clyde?

December has the shortest days of the year in Port Clyde, with an average of 9h and 0min of daylight.

What is the average length of the day in December?

In Port Clyde, the average day length in December is 8h and 58min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 6:52 am and sunset at 4:00 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 4:09 pm EST.

What is the month with the least sunshine?

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

How many hours of sunshine does Port Clyde have in December?

In December, the average sunshine duration is 4.5h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In Port Clyde, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to 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
Port Clyde, ME

Average temperature in December - Port Clyde, ME
  • Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is August (60.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in December
Port Clyde, ME

Average pressure in December - Port Clyde, 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
Port Clyde, ME

Average wind speed in December - Port Clyde, ME
  • Average wind speed in December: 14.4mph

The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).

Average humidity in December
Port Clyde, ME

Average humidity in December - Port Clyde, ME
  • Average humidity in December: 77%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).

Average rainfall in December
Port Clyde, ME

Average rainfall in December - Port Clyde, ME
  • Average rainfall in December: 3.35"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in December
Port Clyde, ME

Average rainfall days in December - Port Clyde, ME
  • Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in December
Port Clyde, ME

Average snowfall in December - Port Clyde, ME
  • Average snowfall in December: 1.81"

The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Port Clyde, ME

Average snowfall days in December - Port Clyde, ME
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Port Clyde, ME

Average daylight in December / Average sunshine in December - Port Clyde, ME
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).

Average sunshine days in December
Port Clyde, ME

Average sunshine days in December - Port Clyde, ME
  • Average sunshine days in December: 12.3 days

The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.5 days).

Average UV index in December
Port Clyde, ME

Average UV index in December - Port Clyde, 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
Port Clyde, ME

Average cloud cover in December - Port Clyde, ME
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Port Clyde, ME

Average visibility in December - Port Clyde, 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).

Port Clyde, Maine, USA

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