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
December's onset brings a slight change in high-temperatures, falling from a cool 50.7°F (10.4°C) in November to a cold 41.5°F (5.3°C). During December, Cedar Grove consistently records a temperature low averaging a freezing cold 31.1°F (-0.5°C).Humidity
In December, the average relative humidity is 77%.Rainfall
In Cedar Grove, New Jersey, in December, during 10.6 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Cedar Grove, during the entire year, the rain falls for 153.3 days and collects up to 24.92" (633mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, in Cedar Grove, it is snowing for 3.6 days. Throughout December, 1.18" (30mm) of snow is accumulated. Throughout the year, there are 22.1 snowfall days, and 8.9" (226mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Cedar Grove.On the first day of December, sunrise is at 7:02 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:39 pm EST.
Sunshine
The average sunshine in December in Cedar Grove is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cedar Grove. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Cedar Grove?
What is the average humidity in December in Cedar Grove?
How much does it rain in Cedar Grove in December?
How many days does it snow in December in Cedar Grove?
What is the month with the shortest days in Cedar Grove?
How many hours of daylight does Cedar Grove have in December?
When is the sunrise / sunset in December in Cedar Grove?
How long on average sun shines in December in Cedar Grove?
When is the lowest UV index in Cedar Grove?
What is the UV index reading in December in Cedar Grove?
Average temperature in December
Cedar Grove, NJ
- Average high temperature in December: 41.5°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 (35.2°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in December
Cedar Grove, 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
Cedar Grove, NJ
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in December
Cedar Grove, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in December
Cedar Grove, NJ
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in December
Cedar Grove, NJ
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in December
Cedar Grove, NJ
- Average snowfall in December: 1.18"
The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Cedar Grove, NJ
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cedar Grove, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Cedar Grove, NJ
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Cedar Grove, 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
Cedar Grove, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Cedar Grove, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Cedar Grove, New Jersey, USA
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