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
In December, the meteorological conditions alter, with the average high-temperature shifting from a frosty 48.4°F (9.1°C) in November to an icy 38.7°F (3.7°C). Greendell observes an average nighttime low-temperature of 27.3°F (-2.6°C) during the month of December.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 82%.Rainfall
In Greendell, in December, during 11.5 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Greendell, during the entire year, the rain falls for 161.1 days and collects up to 28.98" (736mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Greendell. In December, in Greendell, it is snowing for 6.5 days. Throughout December, 2.83" (72mm) of snow is accumulated. Throughout the year, in Greendell, there are 36.8 snowfall days, and 17.52" (445mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:41 pm EST.
Sunshine
In December, the average sunshine in Greendell is 4.6h.UV index
December is the month with the lowest UV index in Greendell, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 1 in December leads to these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. 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
Is it cold in Greendell during December?
What are the most humid months in Greendell?
What is the average humidity in December in Greendell?
How much does it rain in Greendell in December?
How many days does it snow in December in Greendell?
What is the month with the shortest days in Greendell?
How many hours of daylight does Greendell have in December?
When is the sunrise / sunset in December in Greendell?
How many hours of sunshine does Greendell have in December?
When is the lowest UV index in Greendell?
What is the UV index intensity in December in Greendell?
Average temperature in December
Greendell, NJ
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Greendell, NJ
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Greendell, NJ
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Greendell, NJ
- Average humidity in December: 82%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Greendell, NJ
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Greendell, NJ
- Average rainfall days in December: 11.5 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in December
Greendell, NJ
- Average snowfall in December: 2.83"
The months with the highest snowfall are January and February (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Greendell, NJ
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greendell, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Greendell, NJ
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Greendell, NJ
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Greendell, NJ
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Greendell, NJ
- 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).
Greendell, New Jersey, USA
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