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
December's onset brings a reduction in the average high-temperature, from a cold 39.2°F (4°C) in November to a freezing cold 27.7°F (-2.4°C). Throughout December, the average low-temperature in Granby dips to 17.6°F (-8°C).Humidity
The average relative humidity in December in Granby is 86%.Rainfall
In Granby, during December, the rain falls for 9.5 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Granby, during the entire year, the rain falls for 160.9 days and collects up to 30.04" (763mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Granby, during December, snow falls for 20.4 days and regularly aggregates up to 8.46" (215mm) of snow. Throughout the year, there are 108 snowfall days, and 60.35" (1533mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Granby.On the first day of December, sunrise is at 7:04 am and sunset at 4:08 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:17 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Granby. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 1 in December translates into this advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is December in Granby?
What is the average humidity in December in Granby?
How many days does it rain in December in Granby?
How many days does it snow in December in Granby?
What is the month with the shortest days in Granby?
What is the average length of the day in December in Granby?
When are sunrise and sunset in December in Granby?
How many hours of sunshine does Granby have in December?
What are the months with the lowest UV index in Granby?
What is the UV index reading in December in Granby?
Average temperature in December
Granby, VT
- Average high temperature in December: 27.7°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 17.6°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in December
Granby, 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
Granby, VT
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Granby, VT
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (76%).
Average rainfall in December
Granby, VT
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is October (2.99").
The driest months (with the least rainfall) are August and September (2.13").
Average rainfall days in December
Granby, VT
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Granby, VT
- Average snowfall in December: 8.46"
The month with the highest snowfall is February (13.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Granby, VT
- Average snowfall days in December: 20.4 days
The month with the highest number of snowfall days is January (22.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Granby, 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in December
Granby, VT
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (5 days).
Average UV index in December
Granby, 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
Granby, VT
- Average cloud cover in December: 70
The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in December
Granby, 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).
Granby, Vermont, USA
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