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 brings a minor shift in the average high-temperature, adjusting from a fresh 54°F (12.2°C) in November to a frosty 46°F (7.8°C). In Northfield, nights during December observe an average temperature decrease to a cold 37.4°F (3°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In Northfield, during December, the rain falls for 9.8 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Northfield, New Jersey, during the entire year, the rain falls for 140.2 days and collects up to 18.54" (471mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Northfield, in December, snow falls for 2.4 days, with typically accumulated 0.67" (17mm) of snow. Throughout the year, there are 12.1 snowfall days, and 3.35" (85mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:59 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Northfield is 5.2h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December in Northfield?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Northfield, NJ
- Average high temperature in December: 46°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in December: 37.4°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in December
Northfield, 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 (29.94"Hg).
Average wind speed in December
Northfield, NJ
- Average wind speed in December: 11.1mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity in December
Northfield, NJ
- Average humidity in December: 76%
The months with the highest relative humidity are May and June (80%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Northfield, NJ
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is August (2.01").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Northfield, NJ
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Northfield, NJ
- Average snowfall in December: 0.67"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Northfield, NJ
- Average snowfall days in December: 2.4 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
Northfield, NJ
- Average daylight in December: 9h and 2min
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 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
Northfield, NJ
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in December
Northfield, 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 and December (UV index 2).
Average cloud cover in December
Northfield, NJ
- Average cloud cover in December: 44
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Northfield, 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).
Northfield, New Jersey, USA
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