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
Groton's progression into December includes a drop in the average high-temperature, from a cold 39.7°F (4.3°C) in November to a subzero cold 28.6°F (-1.9°C). Throughout December, Groton witnesses a nighttime temperature average of 18.1°F (-7.7°C).Humidity
In December, the average relative humidity in Groton is 85%.Rainfall
In Groton, in December, during 10.4 rainfall days, 2.36" (60mm) of precipitation is typically 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 Groton. In Groton, Vermont, in December, snow falls for 19.1 days, with typically accumulated 7.52" (191mm) of snow. In Groton, during the entire year, snow falls for 98.4 days and aggregates up to 51.97" (1320mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Groton.On the first day of the month, sunrise is at 7:05 am and sunset at 4:11 pm. On the last day of December, 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 estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 1 suggests these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Groton in December?
What is the average humidity in December in Groton?
How many days does it rain in December in Groton?
How many days does it snow in December in Groton?
What is the month with the shortest days in Groton?
What is the average length of the day in December in Groton?
What time are sunrise and sunset in December in Groton?
How long on average sun shines in December in Groton?
What are the months with the lowest UV index in Groton?
What is the UV index intensity in December in Groton?
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 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: 3h and 2min
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).
Groton, Vermont, USA
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