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
As December begins, there is a minor decrease in the average high-temperature, softly falling from a cool 54°F (12.2°C) in November to a chilly 45.5°F (7.5°C). During the month of December, Port Norris experiences a steady low-temperature average of 35.4°F (1.9°C).Humidity
In Port Norris, New Jersey, the average relative humidity in December is 77%.Rainfall
In December, the rain falls for 9.2 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. In Port Norris, during the entire year, the rain falls for 132.2 days and collects up to 15.39" (391mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Port Norris, during December, snow falls for 2.2 days and regularly aggregates up to 0.43" (11mm) of snow. In Port Norris, during the entire year, snow falls for 13 days and aggregates up to 3.58" (91mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:47 pm EST.
Sunshine
In Port Norris, the average sunshine in December is 5.2h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Port Norris. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December in Port Norris?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Port Norris have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December in Port Norris?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Port Norris, NJ
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in December
Port Norris, 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
Port Norris, NJ
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Port Norris, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Port Norris, NJ
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is August (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Port Norris, NJ
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in December
Port Norris, NJ
- Average snowfall in December: 0.43"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Port Norris, NJ
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is January (4 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
Port Norris, NJ
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Port Norris, NJ
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in December
Port Norris, 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 and December (UV index 2).
Average cloud cover in December
Port Norris, 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 28).
Average visibility in December
Port Norris, 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).
Port Norris, New Jersey, USA
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