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
With the commencement of December, Cedar Brook records a moderate temperature decline, with the average high easing from November's cool 53.4°F (11.9°C) to a frosty 44.6°F (7°C). Throughout December, an average nighttime temperature of 33.8°F (1°C) is experienced in Cedar Brook.Humidity
The average relative humidity in December in Cedar Brook is 77%.Rainfall
In Cedar Brook, during December, the rain falls for 7.9 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Cedar Brook, during the entire year, the rain falls for 115.1 days and collects up to 11.97" (304mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Cedar Brook, New Jersey. In Cedar Brook, in December, snow falls for 2.4 days, with typically accumulated 0.28" (7mm) of snow. In Cedar Brook, during the entire year, snow falls for 13.1 days and aggregates up to 3.5" (89mm) of snow.Daylight
December has the shortest days of the year in Cedar Brook, with an average of 9h and 24min of daylight.On the first day of December in Cedar Brook, sunrise is at 7:02 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:45 pm EST.
Sunshine
In December, the average sunshine in Cedar Brook 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 of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Cedar Brook?
What is the average humidity in December in Cedar Brook?
How much does it rain in Cedar Brook in December?
How many days does it snow in December in Cedar Brook?
What is the month with the shortest days in Cedar Brook?
How many hours of daylight does Cedar Brook have in December?
When is the sunrise / sunset in December in Cedar Brook?
How long on average sun shines in December in Cedar Brook?
What are the months with the lowest UV index in Cedar Brook?
How high is the UV index in December in Cedar Brook?
Average temperature in December
Cedar Brook, NJ
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in December: 33.8°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Cedar Brook, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Cedar Brook, NJ
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are March and April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Cedar Brook, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Cedar Brook, NJ
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is July (1.42").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Cedar Brook, NJ
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in December
Cedar Brook, NJ
- Average snowfall in December: 0.28"
The months with the highest snowfall are January and February (1.06").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Cedar Brook, NJ
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is February (4 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
Cedar Brook, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Cedar Brook, NJ
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (13.9 days).
Average UV index in December
Cedar Brook, 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
Cedar Brook, 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
Cedar Brook, 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).
Cedar Brook, New Jersey, USA
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