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
Rockwood observes a small decrease in the average high-temperature with the arrival of December, falling from November's cool 53.6°F (12°C) to a chilly 45.5°F (7.5°C). During December, Rockwood's temperature averages to an icy 34.2°F (1.2°C) at night.Humidity
The average relative humidity in December is 77%.Rainfall
In Rockwood, New Jersey, in December, during 7.7 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, in Rockwood, there are 115 rainfall days, and 12.44" (316mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rockwood are January through March, May, November and December. In Rockwood, in December, during 2.3 snowfall days, 0.24" (6mm) of snow is typically accumulated. In Rockwood, during the entire year, snow falls for 11.9 days and aggregates up to 2.99" (76mm) of snow.Daylight
The month with the shortest days in Rockwood is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:34 pm. On the last day of December, in Rockwood, New Jersey, sunrise is at 7:19 am and sunset at 4:44 pm EST.
Sunshine
In December, the average sunshine in Rockwood is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rockwood in December?
What is the average humidity in December in Rockwood?
How much does it rain in Rockwood in December?
How many days does it snow in December in Rockwood?
What is the month with the shortest days in Rockwood?
What is the average length of the day in December in Rockwood?
When is the sunrise / sunset in December in Rockwood?
How many hours of sunshine does Rockwood have in December?
When is the lowest UV index in Rockwood?
What is the UV index reading in December in Rockwood?
Average temperature in December
Rockwood, NJ
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in December
Rockwood, 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 (29.94"Hg).
Average wind speed in December
Rockwood, NJ
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Rockwood, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Rockwood, NJ
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is July (1.54").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Rockwood, NJ
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in December
Rockwood, NJ
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in December
Rockwood, NJ
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rockwood, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Rockwood, NJ
- Average sunshine days in December: 21.6 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in December
Rockwood, NJ
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Rockwood, NJ
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Rockwood, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rockwood, New Jersey, USA
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