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 average high-temperature decreases from a fresh 50.2°F (10.1°C) in November to a wintry 41°F (5°C). The average temperature during December nights dips to a subzero cold 29.3°F (-1.5°C).Humidity
February, October and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In Grandin, during December, the rain falls for 11.2 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 152.5 rainfall days, and 23.78" (604mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Grandin, in December, during 3.8 snowfall days, 1.57" (40mm) of snow is typically accumulated. In Grandin, during the entire year, snow falls for 24.8 days and aggregates up to 8.66" (220mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:42 pm EST.
Sunshine
In Grandin, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Grandin are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Grandin in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Grandin have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Grandin, NJ
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Grandin, NJ
- Average pressure in December: 30.09"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
Grandin, NJ
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Grandin, NJ
- Average humidity in December: 80%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Grandin, NJ
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is July (2.6").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in December
Grandin, NJ
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in December
Grandin, NJ
- Average snowfall in December: 1.57"
The month with the highest snowfall is March (2.4").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grandin, NJ
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grandin, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Grandin, NJ
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in December
Grandin, NJ
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Grandin, NJ
- Average cloud cover in December: 49
The months with the most cloud cover are February and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Grandin, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, July, November and December (6mi).
The months with the lowest visibility are February, May, June, August, September and October (5mi).
Grandin, New Jersey, USA
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