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
The onset of December is marked by a decrease in temperature, transitioning from a wintry 38.1°F (3.4°C) in November to a subzero cold 26.1°F (-3.3°C). Throughout December, Greenville records an average temperature of 16.3°F (-8.7°C) at night.Humidity
In Greenville, the average relative humidity in December is 86%.Rainfall
In Greenville, in December, it is raining for 8.3 days, with typically 3.23" (82mm) of accumulated precipitation. Throughout the year, in Greenville, there are 147.1 rainfall days, and 34.65" (880mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 18.1 days. Throughout December, 13.66" (347mm) of snow is accumulated. Throughout the year, there are 104.3 snowfall days, and 76.26" (1937mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 3:56 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:05 pm EST.
Sunshine
The average sunshine in December is 3.3h.UV index
The months with the lowest UV index in Greenville are January through March, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 1 during December translates into these guidelines:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Greenville have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Greenville, ME
- Average high temperature in December: 26.1°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (20.8°F).
- Average low temperature in December: 16.3°F
The month with the highest average low temperature is July (54.5°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in December
Greenville, 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 (29.9"Hg).
Average wind speed in December
Greenville, ME
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Greenville, ME
- Average humidity in December: 86%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (77%).
Average rainfall in December
Greenville, ME
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is February (2.24").
Average rainfall days in December
Greenville, ME
- Average rainfall days in December: 8.3 days
The months with the highest number of rainy days are July and August (17.8 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Greenville, ME
- Average snowfall in December: 13.66"
The month with the highest snowfall is January (14.33").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Greenville, ME
- Average snowfall days in December: 18.1 days
The month with the highest number of snowfall days is February (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenville, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in December
Greenville, ME
- Average sunshine days in December: 11 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in December
Greenville, ME
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Greenville, ME
- Average cloud cover in December: 67
The month with the most cloud cover is February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 45).
Average visibility in December
Greenville, ME
- Average visibility in December: 4mi
The months with the highest visibility are May, July, October and November (5mi).
The months with the lowest visibility are January, February, March, April, June, August, September and December (4mi).
Greenville, Maine, USA
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