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
In Mount Vernon, the average high-temperature in December drops from a chilly 43°F (6.1°C) in November to a freezing cold 31.1°F (-0.5°C). During December, the average low-temperature in Mount Vernon is a still subzero cold 20.1°F (-6.6°C).Humidity
In December, the average relative humidity in Mount Vernon is 81%.Rainfall
In Mount Vernon, in December, during 9.6 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, in Mount Vernon, there are 142.5 rainfall days, and 30.47" (774mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Mount Vernon, during December, snow falls for 10.1 days and regularly aggregates up to 7.01" (178mm) of snow. Throughout the year, in Mount Vernon, there are 54.3 snowfall days, and 40.87" (1038mm) of snow is accumulated.Daylight
The month with the shortest days in Mount Vernon is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:01 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:10 pm EST.
Sunshine
The average sunshine in December in Mount Vernon is 4.5h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
How cold is it in Mount Vernon in December?
What is the average humidity in December in Mount Vernon?
How many days does it rain in December in Mount Vernon?
How much does it snow in Mount Vernon in December?
What is the month with the shortest days in Mount Vernon?
How many hours of daylight does Mount Vernon have in December?
What time are sunrise and sunset in December in Mount Vernon?
How long on average sun shines in December in Mount Vernon?
When is the lowest UV index in Mount Vernon?
How high is the UV index in December in Mount Vernon?
Average temperature in December
Mount Vernon, ME
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in December: 20.1°F
The month with the highest average low temperature is July (56.7°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in December
Mount Vernon, ME
- Average pressure in December: 30.01"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Mount Vernon, ME
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is March (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Mount Vernon, ME
- Average humidity in December: 81%
The months with the highest relative humidity are February and March (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Mount Vernon, ME
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Mount Vernon, ME
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Mount Vernon, ME
- Average snowfall in December: 7.01"
The month with the highest snowfall is February (9.33").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mount Vernon, ME
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Vernon, 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 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Mount Vernon, ME
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is September (17.6 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Mount Vernon, 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, October, November and December (UV index 2).
Average cloud cover in December
Mount Vernon, ME
- Average cloud cover in December: 52
The months with the most cloud cover are February, March and April (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in December
Mount Vernon, ME
- Average visibility in December: 5mi
The month with the highest visibility is November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (5mi).
Mount Vernon, Maine, USA
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