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 signals a slight drop in average high-temperature, sliding from November's cool 52.7°F (11.5°C) to a chilly 44.1°F (6.7°C). In December, the average low-temperature records at a cold 32.9°F (0.5°C) during the nights.Humidity
In Westville, New Jersey, the average relative humidity in December is 76%.Rainfall
In Westville, during December, the rain falls for 7.5 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, in Westville, there are 127.8 rainfall days, and 13.82" (351mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Westville, in December, during 1.6 snowfall days, 0.2" (5mm) of snow is typically accumulated. Throughout the year, there are 11.4 snowfall days, and 2.87" (73mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December in Westville, sunrise is at 7:03 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Westville is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. 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
Is December cold in Westville?
What is the average humidity in December in Westville?
How much does it rain in Westville in December?
How many days does it snow in December in Westville?
What is the month with the shortest days in Westville?
What is the average length of the day in December in Westville?
When is the sunrise / sunset in December in Westville?
How many hours of sunshine does Westville have in December?
When is the lowest UV index in Westville?
What is the UV index intensity in December in Westville?
Average temperature in December
Westville, NJ
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in December
Westville, 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
Westville, NJ
- Average wind speed in December: 7.7mph
The windiest months (with the highest average wind speed) are March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Westville, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is October (77%).
The months with the lowest relative humidity are April and August (71%).
Average rainfall in December
Westville, NJ
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is August (1.65").
The driest months (with the least rainfall) are January and February (0.83").
Average rainfall days in December
Westville, NJ
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is February (7.2 days).
Average snowfall in December
Westville, NJ
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Westville, NJ
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is January (3.8 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
Westville, 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
Westville, NJ
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in December
Westville, 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
Westville, NJ
- Average cloud cover in December: 46
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Westville, 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).
Westville, New Jersey, USA
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