December weather forecastDeerfield, NJ
December
Weather in December
The first month of the winter, December, is also a frosty month in Deerfield, New Jersey, with temperature in the range of an average low of 34.5°F (1.4°C) and an average high of 45.3°F (7.4°C).Temperature
The arrival of December correlates with a minor temperature reduction, down from November's cool 54°F (12.2°C) to a chilly 45.3°F (7.4°C). Deerfield in December experiences a low-temperature average of 34.5°F (1.4°C).Humidity
In Deerfield, the average relative humidity in December is 77%.Rainfall
In Deerfield, in December, it is raining for 7.8 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, in Deerfield, there are 105.4 rainfall days, and 8.03" (204mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In December, in Deerfield, it is snowing for 1.4 days. Throughout December, 0.24" (6mm) of snow is accumulated. In Deerfield, during the entire year, snow falls for 10.9 days and aggregates up to 1.38" (35mm) 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 7:02 am and sunset at 4:37 pm. On the last day of December, in Deerfield, sunrise is at 7:20 am and sunset at 4:47 pm EST.
Sunshine
In Deerfield, 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 Deerfield. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Deerfield, NJ
- Average high temperature in December: 45.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 34.5°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 (27.7°F).
Average pressure in December
Deerfield, NJ
- Average pressure in December: 30.1"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
Deerfield, NJ
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Deerfield, 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 (72%).
Average rainfall in December
Deerfield, NJ
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is August (0.94").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in December
Deerfield, NJ
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is November (5.1 days).
Average snowfall in December
Deerfield, NJ
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (0.43").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Deerfield, NJ
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is January (3.4 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
Deerfield, 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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Deerfield, NJ
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is November (23.1 days).
The month with the least sunshine days is July (14.1 days).
Average UV index in December
Deerfield, 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
Deerfield, 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 29).
Average visibility in December
Deerfield, 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).
