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 average high-temperature decreases in December, falling from a chilly 43.9°F (6.6°C) in November to an icy 33.3°F (0.7°C). Groton logs an average low-temperature of 24.4°F (-4.2°C) during the nights of December, subtly lower than its daytime highs.Humidity
In December, the average relative humidity in Groton is 87%.Rainfall
In Groton, New York, in December, during 8.1 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 143 rainfall days, and 21.3" (541mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Groton, in December, snow falls for 12.5 days, with typically accumulated 3.9" (99mm) of snow. In Groton, during the entire year, snow falls for 68.6 days and aggregates up to 18.98" (482mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Groton, New York, sunrise is at 7:16 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:42 pm EST.
Sunshine
In December, the average sunshine in Groton, New York, is 3h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Groton. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 1 during December translates into these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold is December in Groton?
What is the average humidity in December in Groton?
How many days does it rain in December in Groton?
How much does it snow in Groton in December?
What is the month with the shortest days in Groton?
How many hours of daylight does Groton have in December?
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?
How high is the UV index in December in Groton?
Average temperature in December
Groton, NY
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Groton, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Groton, NY
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in December
Groton, NY
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in December
Groton, NY
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Groton, NY
- Average rainfall days in December: 8.1 days
The months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in December
Groton, NY
- Average snowfall in December: 3.9"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Groton, NY
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is February (15.3 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, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Groton, NY
- Average sunshine days in December: 13.2 days
The month with the most sunshine days is September (15.9 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Groton, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Groton, NY
- Average cloud cover in December: 70
The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in December
Groton, NY
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Groton, New York, USA
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