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 sea temperature 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 signifies a gentle decline in Sewaren's average high-temperature, easing from a fresh 52°F (11.1°C) in November to a frosty 43.3°F (6.3°C). Sewaren experiences a nighttime temperature average of 33.4°F (0.8°C) during December.Humidity
In Sewaren, the average relative humidity in December is 76%.Rainfall
The months with the most rainfall in Sewaren are July and December, with an average 3.31" (84mm) of precipitation.Snowfall
Months with snowfall in Sewaren are January through April, October through December. In Sewaren, in December, snow falls for 3.4 days, with typically accumulated 1.34" (34mm) of snow. Throughout the year, there are 19.5 snowfall days, and 8.35" (212mm) of snow is accumulated.Ocean temperature
In Sewaren, the average seawater temperature in December is 47.1°F (8.4°C).Note: Swimming in 47.1°F (8.4°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
The month with the shortest days in Sewaren, New Jersey, is December, with an average of 9h and 18min of daylight.On the first day of December in Sewaren, sunrise is at 7:01 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:40 pm EST.
Sunshine
The average sunshine in December in Sewaren is 4.9h.UV index
The months with the lowest UV index in Sewaren are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Sewaren in December?
What is the average humidity in December in Sewaren?
What is the wettest month in Sewaren?
How much does it rain in Sewaren in December?
How many days does it snow in December in Sewaren?
How cold is the water in December in Sewaren?
What is the month with the shortest days in Sewaren?
How many hours of daylight does Sewaren have in December?
When is the sunrise / sunset in December in Sewaren?
How many hours of sunshine does Sewaren have in December?
What are the months with the lowest UV index in Sewaren?
What is the UV index intensity in December in Sewaren?
Average temperature in December
Sewaren, NJ
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in December
Sewaren, 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
Sewaren, NJ
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Sewaren, NJ
- Average humidity in December: 76%
The months with the highest relative humidity are February and May (77%).
The months with the lowest relative humidity are March, April, August and November (73%).
Average rainfall in December
Sewaren, NJ
- Average rainfall in December: 3.31"
The wettest months (with the highest rainfall) are July and December (3.31").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Sewaren, NJ
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Sewaren, NJ
- Average snowfall in December: 1.34"
The month with the highest snowfall is March (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Sewaren, NJ
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Sewaren, NJ
- Average sea temperature in December: 47.2°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in December /
Average sunshine in December
Sewaren, 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 18min).
- Average sunshine in December: 4h and 5min
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 42min).
Average sunshine days in December
Sewaren, NJ
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in December
Sewaren, 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
Sewaren, NJ
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Sewaren, 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).
Sewaren, New Jersey, USA
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