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
The average high-temperature decreases in December, shifting from a frosty 48.6°F (9.2°C) in November to a cold 38.8°F (3.8°C). During the month of December, an average low-temperature of 27.5°F (-2.5°C) is recorded.Humidity
In December, the average relative humidity is 81%.Rainfall
In December, the rain falls for 8.8 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 133 rainfall days, and 14.02" (356mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Newfoundland, during December, snow falls for 4.5 days and regularly aggregates up to 1.02" (26mm) of snow. Throughout the year, there are 26.7 snowfall days, and 6.06" (154mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:39 pm EST.
Sunshine
In December, the average sunshine is 4.5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during December leads to these advisories:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December in Newfoundland?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Newfoundland have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Newfoundland, NJ
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Newfoundland, 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
Newfoundland, NJ
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Newfoundland, NJ
- Average humidity in December: 81%
The month with the highest relative humidity is October (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Newfoundland, NJ
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is July (1.85").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Newfoundland, NJ
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Newfoundland, NJ
- Average snowfall in December: 1.02"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Newfoundland, NJ
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Newfoundland, 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 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Newfoundland, NJ
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in December
Newfoundland, NJ
- Average UV index in December: 2
The month with the highest UV index is June (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
Newfoundland, NJ
- Average cloud cover in December: 52
The months with the most cloud cover are February and March (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in December
Newfoundland, 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).
Newfoundland, New Jersey, USA
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