December weather forecast and climate
Sinclair, ME

The first month of the winter, December, is also a subzero cold month in Sinclair, Maine, with temperature in the range of an average low of 12.2°F (-11°C) and an average high of 23.9°F (-4.5°C).

Temperature

In Sinclair, the average high-temperature decreases, from a cold 36.5°F (2.5°C) in November, to a freezing cold 23.9°F (-4.5°C). The average low-temperature, in December, is 12.2°F (-11°C).

Humidity

The average relative humidity in December is 90%.

Rainfall

In Sinclair, during December, the rain falls for 7.8 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Sinclair, during the entire year, the rain falls for 140.8 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Sinclair. In Sinclair, snow falls for 17.8 days, with typically accumulated 12.28" (312mm) of snow. In Sinclair, during the entire year, snow falls for 107.8 days, and aggregates up to 71.34" (1812mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8.6h of daylight.

Sunshine

The average sunshine in December is 2.9h.

UV index

January through March, 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 the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 1 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Sinclair?

In Sinclair, in December, the average high-temperature is 23.9°F (-4.5°C), and the average low-temperature is 12.2°F (-11°C).

What is the average humidity in December in Sinclair?

In December, the average relative humidity in Sinclair, Maine, is 90%.

How many days does it rain in December in Sinclair?

In Sinclair, during December, the rain falls for 7.8 days and regularly aggregates up to 2.76" (70mm) of precipitation.

How many days does it snow in December in Sinclair?

In Sinclair, Maine, in December, snow falls for 17.8 days, with typically accumulated 12.28" (312mm) of snow.

What is the month with the shortest days in Sinclair?

With an average of 8.6h of daylight, December has the shortest days of the year in Sinclair.

What is the average length of the day in December in Sinclair?

In Sinclair, Maine, the average length of the day in December is 8.6h.

How long on average sun shines in December in Sinclair?

The average sunshine in December in Sinclair, Maine, is 2.9h.

What is the month with the lowest UV index in Sinclair?

Months with the lowest UV index in Sinclair, Maine, are January through March, November and December, with an average maximum UV index of 1.

What is the UV index reading in December in Sinclair?

The average daily maximum UV index in December in Sinclair, Maine, is 1. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.
Average temperature in December - Sinclair, ME
  • Average high temperature in December: 23.9°F

The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (18°F).

  • Average low temperature in December: 12.2°F

The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is January (2.8°F).

Average pressure in December - Sinclair, ME
  • Average pressure in December: 30"

Months with the highest atmospheric pressure are March, September and November (30.01").
The month with the lowest atmospheric pressure is June (29.88").

Average wind speed in December - Sinclair, ME
  • Average wind speed in December: 7.7mph

The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in December - Sinclair, ME
  • Average humidity in December: 90%

The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is May (76%).

Average rainfall in December - Sinclair, ME
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is February (1.97").

Average rainfall days in December - Sinclair, ME
  • Average rainfall days in December: 7.8 days

The month with the highest number of rainy days is July (17.1 days).
Months with the least rainy days are January and February (4.3 days).

Average snowfall in December - Sinclair, ME
  • Average snowfall in December: 12.28"

The month with the highest snowfall is January (14.92").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in December - Sinclair, ME
  • Average snowfall days in December: 17.8 days

The month with the highest number of snowfall days is January (21.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Sinclair, ME
  • Average daylight in December: 8.6h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in December: 2.9h

The month with the most sunshine is August (Average sunshine: 9.5h).
The month with the least sunshine is February (Average sunshine: 2.1h).

Average sunshine days in December - Sinclair, ME
  • Average sunshine days in December: 11.5 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is April (7.9 days).

Average UV index in December - Sinclair, ME
  • Average UV index in December: 1

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in December - Sinclair, ME
  • Average cloud cover in December: 70

The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 42).

Average visibility in December - Sinclair, ME
  • Average visibility in December: 4mi

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