December weather forecastCliff Island, ME
December
Weather in December
December, the first month of the winter in Cliff Island, is also a wintry month, with an average temperature fluctuating between 36.3°F (2.4°C) and 27.3°F (-2.6°C).Temperature
The decrease of average high-temperatures is mild in December, with a decline from a chilly 45.7°F (7.6°C) in November to a wintry 36.3°F (2.4°C). Cliff Island's nocturnal readings in December exhibit minimal variation from the daytime temperatures, averaging at a subzero cold 27.3°F (-2.6°C).Humidity
In Cliff Island, the average relative humidity in December is 77%.Rainfall
In December, the rain falls for 8.2 days. Throughout December, 1.97" (50mm) of precipitation is accumulated. In Cliff Island, Maine, during the entire year, the rain falls for 117.6 days and collects up to 19.8" (503mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Cliff Island, during December, snow falls for 5.5 days and regularly aggregates up to 2.05" (52mm) of snow. In Cliff Island, during the entire year, snow falls for 28.5 days and aggregates up to 12.05" (306mm) of snow.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 6:54 am and sunset at 4:04 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:13 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.6h 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. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cliff Island, ME
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 27.3°F
The months with the highest average low temperature are July and August (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Cliff Island, ME
- Average pressure in December: 30.01"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Cliff Island, ME
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in December
Cliff Island, ME
- Average humidity in December: 77%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
Cliff Island, ME
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is October (2.28").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in December
Cliff Island, ME
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is July (14.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in December
Cliff Island, ME
- Average snowfall in December: 2.05"
The month with the highest snowfall is February (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cliff Island, ME
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cliff Island, 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 36min
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 36min).
Average sunshine days in December
Cliff Island, ME
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is September (19 days).
The month with the least sunshine days is July (14.7 days).
Average UV index in December
Cliff Island, 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
Cliff Island, ME
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Cliff Island, 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).
