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 Pennington, the beginning of December is marked by a lowered average high-temperature, shifting from November's cool 52°F (11.1°C) to a frosty 42.8°F (6°C). Throughout the month of December, Pennington reports a steady low-temperature average of 31.5°F (-0.3°C).Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 78%.Rainfall
In Pennington, in December, during 8.7 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Pennington, during the entire year, the rain falls for 138.1 days and collects up to 16.5" (419mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Pennington, in December, during 2.8 snowfall days, 0.59" (15mm) of snow is typically accumulated. In Pennington, during the entire year, snow falls for 15.6 days and aggregates up to 2.8" (71mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:43 pm EST.
Sunshine
In December, the average sunshine is 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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
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 long on average sun shines in December in Pennington?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Pennington, NJ
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 31.5°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Pennington, 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
Pennington, NJ
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Pennington, NJ
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in December
Pennington, NJ
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is July (2.24").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Pennington, NJ
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in December
Pennington, NJ
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Pennington, NJ
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Pennington, 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 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Pennington, NJ
- Average sunshine days in December: 19 days
The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in December
Pennington, 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, March, November and December (UV index 2).
Average cloud cover in December
Pennington, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Pennington, 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).
Pennington, New Jersey, USA
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