December weather forecastGroton, VT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Groton, Vermont, with an average temperature varying between 18.1°F (-7.7°C) and 28.6°F (-1.9°C).Temperature
The shift from November to December involves a decrease in the average high-temperature, dropping from a wintry 39.7°F (4.3°C) to a subzero cold 28.6°F (-1.9°C). Throughout December, the temperature in Groton tends to fall to a consistent average low of 18.1°F (-7.7°C).Humidity
The average relative humidity in December in Groton is 85%.Rainfall
In December, the rain falls for 10.4 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. In Groton, during the entire year, the rain falls for 157.2 days and collects up to 28.35" (720mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, in Groton, it is snowing for 19.1 days. Throughout December, 7.52" (191mm) of snow is accumulated. Throughout the year, there are 98.4 snowfall days, and 51.97" (1320mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:05 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:20 pm EST.
Sunshine
The average sunshine in December is 3.3h.UV index
January, February 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 threat to health from unsafe exposure to UV radiation for the average person.Note: In December, an average UV index of 1 transforms into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Groton, VT
- Average high temperature in December: 28.6°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in December: 18.1°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 (9.7°F).
Average pressure in December
Groton, VT
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Groton, VT
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Groton, VT
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (76%).
Average rainfall in December
Groton, VT
- Average rainfall in December: 2.36"
The wettest months (with the highest rainfall) are June and October (2.87").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Groton, VT
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Groton, VT
- Average snowfall in December: 7.52"
The month with the highest snowfall is January (12.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Groton, VT
- Average snowfall days in December: 19.1 days
The month with the highest number of snowfall days is February (20.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Groton, VT
- Average daylight in December: 8h and 54min
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: 3h and 18min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in December
Groton, VT
- Average sunshine days in December: 8.4 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (6.6 days).
Average UV index in December
Groton, VT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Groton, VT
- Average cloud cover in December: 68
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 39).
Average visibility in December
Groton, VT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).
