December weather forecast
Old Mill Farms, NJ

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Weather in December

December, the first month of the winter in Old Mill Farms, is still a chilly month, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 43°F (6.1°C).

Temperature

The onset of December brings a small shift in high-temperatures, falling from a cool 51.8°F (11°C) in November to a chilly 43°F (6.1°C). Throughout the month of December, the average temperature in Old Mill Farms dips to a freezing cold 31.1°F (-0.5°C) at night.

Humidity

The average relative humidity in December in Old Mill Farms, New Jersey, is 78%.

Rainfall

In Old Mill Farms, during December, the rain falls for 8.2 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Old Mill Farms, New Jersey, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Old Mill Farms, in December, during 2.7 snowfall days, 0.75" (19mm) of snow is typically accumulated. Throughout the year, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:02 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:42 pm EST.

Sunshine

In December, the average sunshine is 5h.

UV index

January through March, 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 vulnerability from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 2 in December leads to these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In December, in Old Mill Farms, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 31.1°F (-0.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is appraised at 89.6°F (32°C).

What is the average humidity in December in Old Mill Farms?

The average relative humidity in December is 78%.

How many days does it rain in December?

In Old Mill Farms, in December, during 8.2 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Old Mill Farms, New Jersey, during December, snow falls for 2.7 days and regularly aggregates up to 0.75" (19mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

How many hours of daylight does Old Mill Farms have in December?

In Old Mill Farms, the average day length in December is 9h and 22min.

When are sunrise and sunset in December?

On the first day of December in Old Mill Farms, sunrise is at 7:02 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:42 pm EST.

How many hours of sunshine does Old Mill Farms have in December?

In Old Mill Farms, the average sunshine duration in December is 5h.

When is the lowest UV index?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Old Mill Farms, NJ

Average temperature in December - Old Mill Farms, NJ
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in December: 31.1°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in December
Old Mill Farms, NJ

Average pressure in December - Old Mill Farms, 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
Old Mill Farms, NJ

Average wind speed in December - Old Mill Farms, NJ
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Old Mill Farms, NJ

Average humidity in December - Old Mill Farms, NJ
  • Average humidity in December: 78%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December
Old Mill Farms, NJ

Average rainfall in December - Old Mill Farms, NJ
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is September (0.67").

Average rainfall days in December
Old Mill Farms, NJ

Average rainfall days in December - Old Mill Farms, NJ
  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

Average snowfall in December
Old Mill Farms, NJ

Average snowfall in December - Old Mill Farms, NJ
  • Average snowfall in December: 0.75"

The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Old Mill Farms, NJ

Average snowfall days in December - Old Mill Farms, NJ
  • Average snowfall days in December: 2.7 days

The month with the highest number of snowfall days is January (4.6 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
Old Mill Farms, NJ

Average daylight in December / Average sunshine in December - Old Mill Farms, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Old Mill Farms, NJ

Average sunshine days in December - Old Mill Farms, NJ
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

Average UV index in December
Old Mill Farms, NJ

Average UV index in December - Old Mill Farms, 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
Old Mill Farms, NJ

Average cloud cover in December - Old Mill Farms, NJ
  • Average cloud cover in December: 47

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in December
Old Mill Farms, NJ

Average visibility in December - Old Mill Farms, NJ
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Old Mill Farms, New Jersey, USA

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