Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
During the transition into December, Jefferson observes a decrease in the average high-temperature, falling from a chilly 45°F (7.2°C) in November to an icy 35.2°F (1.8°C). During the month of December, the temperature in Jefferson generally drops to a low average of 25.9°F (-3.4°C).Humidity
In December, the average relative humidity in Jefferson is 78%.Rainfall
The month with the most rainfall in Jefferson is December, when the rain falls for 11.4 days and typically aggregates up to 3.27" (83mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Jefferson, in December, snow falls for 7.8 days, with typically accumulated 2.99" (76mm) of snow. In Jefferson, during the entire year, snow falls for 40 days and aggregates up to 18.27" (464mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December in Jefferson, Maine, sunrise is at 6:53 am and sunset at 4:00 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:09 pm EST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the average maximum UV index of 2 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. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
How cold is December in Jefferson?
What is the average humidity in December in Jefferson?
What is the wettest month in Jefferson?
How many days does it rain in December in Jefferson?
How many days does it snow in December in Jefferson?
What is the month with the shortest days in Jefferson?
How many hours of daylight does Jefferson have in December?
When is the sunrise / sunset in December in Jefferson?
What are the months with the least sunshine in Jefferson?
How many hours of sunshine does Jefferson have in December?
What is the month with the lowest UV index in Jefferson?
What is the UV index intensity in December in Jefferson?
Average temperature in December
Jefferson, ME
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is August (72.7°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Jefferson, 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
Jefferson, ME
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Jefferson, ME
- Average humidity in December: 78%
The months with the highest relative humidity are June and July (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Jefferson, ME
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is July (1.57").
Average rainfall days in December
Jefferson, ME
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Jefferson, ME
- Average snowfall in December: 2.99"
The month with the highest snowfall is January (4.37").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Jefferson, ME
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jefferson, ME
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Jefferson, ME
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is September (18.3 days).
The month with the least sunshine days is April (11.4 days).
Average UV index in December
Jefferson, 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
Jefferson, ME
- Average cloud cover in December: 51
The months with the most cloud cover are February, March, April and December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Jefferson, 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).
Jefferson, Maine, USA
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