December weather forecastChatsworth, NJ
December
Weather in December
The first month of the winter, December, is also a frosty month in Chatsworth, New Jersey, with an average temperature fluctuating between 44.6°F (7°C) and 33.4°F (0.8°C).Temperature
The start of December comes with a small reduction in the average high-temperature, subtly receding from a cool 53.1°F (11.7°C) in November to a frosty 44.6°F (7°C). Throughout December nights, Chatsworth registers an average low-temperature of 33.4°F (0.8°C).Humidity
In December, the average relative humidity in Chatsworth is 77%.Rainfall
In Chatsworth, during December, the rain falls for 9 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, in Chatsworth, New Jersey, there are 120.9 rainfall days, and 12.8" (325mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Chatsworth, in December, snow falls for 2.5 days, with typically accumulated 0.59" (15mm) of snow. Throughout the year, there are 14.6 snowfall days, and 3.15" (80mm) 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, sunrise is at 7:00 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:43 pm EST.
Sunshine
The average sunshine in December in Chatsworth is 5.1h.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. 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
Average temperature in December
Chatsworth, NJ
- Average high temperature in December: 44.6°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.4°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Chatsworth, 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
Chatsworth, NJ
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Chatsworth, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Chatsworth, NJ
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Chatsworth, NJ
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Chatsworth, NJ
- Average snowfall in December: 0.59"
The month with the highest snowfall is March (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Chatsworth, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 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
Chatsworth, NJ
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 6min
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 54min).
Average sunshine days in December
Chatsworth, NJ
- Average sunshine days in December: 18.9 days
The months with the most sunshine days are January and November (21.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Chatsworth, 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
Chatsworth, NJ
- Average cloud cover in December: 46
The months with the most cloud cover are February and March (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Chatsworth, 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).
