December weather forecast
Grand Lake Stream, ME

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Weather in December

The first month of the winter, December, is also a subzero cold month in Grand Lake Stream, Maine, with an average temperature ranging between min 20.3°F (-6.5°C) and max 31.1°F (-0.5°C).

Temperature

Grand Lake Stream's December weather features a mild decline in high-temperatures, reducing from a cold 42.1°F (5.6°C) in November to a freezing cold 31.1°F (-0.5°C). In Grand Lake Stream, the average temperature during the nights of December drops to a still subzero cold 20.3°F (-6.5°C).

Humidity

In Grand Lake Stream, the average relative humidity in December is 83%.

Rainfall

In Grand Lake Stream, in December, during 8.7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Grand Lake Stream, during the entire year, the rain falls for 122.6 days and collects up to 14.53" (369mm) of precipitation.

Snowfall

Months with snowfall in Grand Lake Stream, Maine, are January through May, October through December. In Grand Lake Stream, in December, snow falls for 10.3 days, with typically accumulated 3.11" (79mm) of snow. In Grand Lake Stream, Maine, during the entire year, snow falls for 60.6 days and aggregates up to 17.91" (455mm) of snow.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year in Grand Lake Stream.
On the first day of the month, sunrise is at 6:50 am and sunset at 3:50 pm. On the last day of December, sunrise is at 7:09 am and sunset at 3:58 pm EST.

Sunshine

In Grand Lake Stream, the average sunshine in December is 4h.

UV index

February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

How cold is December in Grand Lake Stream?

An average high-temperature, in December, in Grand Lake Stream, is 31.1°F (-0.5°C) and the average low-temperature is 20.3°F (-6.5°C).

What is the average humidity in December in Grand Lake Stream?

In December, the average relative humidity in Grand Lake Stream, Maine, is 83%.

How many days does it rain in December in Grand Lake Stream?

In Grand Lake Stream, Maine, in December, it is raining for 8.7 days, with typically 1.46" (37mm) of accumulated precipitation.

How many days does it snow in December in Grand Lake Stream?

In Grand Lake Stream, in December, snow falls for 10.3 days, with typically accumulated 3.11" (79mm) of snow.

What is the month with the shortest days in Grand Lake Stream?

The month with the shortest days in Grand Lake Stream is December, with an average of 8h and 48min of daylight.

What is the average length of the day in December in Grand Lake Stream?

In December, the average day length in Grand Lake Stream is 8h and 49min.

When are sunrise and sunset in December in Grand Lake Stream?

In December, on the first day of the month, sunrise is at 6:50 am and sunset at 3:50 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 3:58 pm EST.

How many hours of sunshine does Grand Lake Stream have in December?

In Grand Lake Stream, Maine, the average sunshine duration in December is 4h.

When is the lowest UV index in Grand Lake Stream?

February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Grand Lake Stream, Maine.

How high is the UV index in December in Grand Lake Stream?

In Grand Lake Stream, Maine, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
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
Grand Lake Stream, ME

Average temperature in December - Grand Lake Stream, ME
  • Average high temperature in December: 31.1°F

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (25.5°F).

  • Average low temperature in December: 20.3°F

The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

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Average pressure in December
Grand Lake Stream, ME

Average pressure in December - Grand Lake Stream, ME
  • Average pressure in December: 29.99"Hg

The month with the highest atmospheric pressure is September (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Grand Lake Stream, ME

Average wind speed in December - Grand Lake Stream, ME
  • Average wind speed in December: 7.4mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in December
Grand Lake Stream, ME

Average humidity in December - Grand Lake Stream, ME
  • Average humidity in December: 83%

The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (77%).

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Average rainfall in December
Grand Lake Stream, ME

Average rainfall in December - Grand Lake Stream, ME
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is November (1.61").
The driest month (with the least rainfall) is September (0.91").

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Average rainfall days in December
Grand Lake Stream, ME

Average rainfall days in December - Grand Lake Stream, ME
  • Average rainfall days in December: 8.7 days

The month with the highest number of rainy days is April (14.2 days).
The month with the least rainy days is February (5.1 days).

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Average snowfall in December
Grand Lake Stream, ME

Average snowfall in December - Grand Lake Stream, ME
  • Average snowfall in December: 3.11"

The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Grand Lake Stream, ME

Average snowfall days in December - Grand Lake Stream, ME
  • Average snowfall days in December: 10.3 days

The month with the highest number of snowfall days is March (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Grand Lake Stream, ME

Average daylight in December / Average sunshine in December - Grand Lake Stream, ME
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).

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Average sunshine days in December
Grand Lake Stream, ME

Average sunshine days in December - Grand Lake Stream, ME
  • Average sunshine days in December: 16.1 days

The month with the most sunshine days is September (18.4 days).
The month with the least sunshine days is April (11.6 days).

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Average UV index in December
Grand Lake Stream, ME

Average UV index in December - Grand Lake Stream, ME
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February, November and December (UV index 1).

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Average cloud cover in December
Grand Lake Stream, ME

Average cloud cover in December - Grand Lake Stream, ME
  • Average cloud cover in December: 58

The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 42).

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Average visibility in December
Grand Lake Stream, ME

Average visibility in December - Grand Lake Stream, ME
  • Average visibility in December: 5mi

The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).

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Grand Lake Stream, Maine, USA

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