December weather forecast and climate
Deans, NJ

December, the first month of the winter, in Deans, is also a frosty month, with temperature in the range of an average low of 32.2°F (0.1°C) and an average high of 43.2°F (6.2°C).

Temperature

In December, the average high-temperature slightly decreases, from a cool 52.2°F (11.2°C) in November, to a chilly 43.2°F (6.2°C). In Deans, in December, the average low-temperature is 32.2°F (0.1°C).

Humidity

Months with the highest humidity are February, May, October and December, with an average relative humidity of 77%.

Rainfall

The month with the most rainfall is December when the rain falls for 11.3 days and typically aggregates up to 3.11" (79mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Deans, snow falls for 3.7 days, with typically accumulated 1.46" (37mm) of snow. In Deans, during the entire year, snow falls for 20.7 days, and aggregates up to 9.33" (237mm) of snow.

Daylight

December has the shortest days of the year in Deans, with an average of 9.3h of daylight.

Sunshine

In Deans, the average sunshine in December is 4.9h.

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 reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Deans?

In Deans, in December, the average high-temperature is 43.2°F (6.2°C), and the average low-temperature is 32.2°F (0.1°C).

What are the most humid months in Deans?

February, May, October and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in December in Deans?

In December, the average relative humidity in Deans, New Jersey, is 77%.

How many days does it rain in December in Deans?

In December, in Deans, the rain falls for 11.3 days. Throughout December, 3.11" (79mm) of precipitation is accumulated.

What is the wettest month in Deans?

December is the month with the most rainfall in Deans. Rain falls for 11.3 days and accumulates 3.11" (79mm) of precipitation.

How much does it snow in Deans in December?

In December, in Deans, New Jersey, it is snowing for 3.7 days. Throughout December, 1.46" (37mm) of snow is accumulated.

What is the month with the shortest days in Deans?

With an average of 9.3h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Deans?

In Deans, the average length of the day in December is 9.3h.

How long on average sun shines in December in Deans?

The average sunshine in December in Deans is 4.9h.

When is the lowest UV index in Deans?

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 Deans?

In Deans, New Jersey, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Deans, NJ
  • Average high temperature in December: 6.2°C

The warmest month (with the highest average high temperature) is July (29.2°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in December: 0.1°C

The month with the highest average low temperature is July (20°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).

Average pressure in December - Deans, NJ
  • Average pressure in December: 1018.7mbar

The month with the highest atmospheric pressure is November (1019.6mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in December - Deans, NJ
  • Average wind speed in December: 13.4km/h

The windiest month (with the highest average wind speed) is March (14.7km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).

Average humidity in December - Deans, NJ
  • Average humidity in December: 77%

Months with the highest relative humidity are February, May, October and December (77%).
Months with the lowest relative humidity are April and August (73%).

Average rainfall in December - Deans, NJ
  • Average rainfall in December: 79mm

The wettest month (with the highest rainfall) is December (79mm).
The driest month (with the least rainfall) is September (37mm).

Average rainfall days in December - Deans, NJ
  • Average rainfall days in December: 11.3 days

Months with the highest number of rainy days are May and June (16.2 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in December - Deans, NJ
  • Average snowfall in December: 37mm

The month with the highest snowfall is March (81mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Deans, NJ
  • Average snowfall days in December: 3.7 days

The month with the highest number of snowfall days is February (6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Deans, NJ
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in December - Deans, NJ
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is June (12 days).

Average UV index in December - Deans, NJ
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December - Deans, NJ
  • Average cloud cover in December: 49

Months with the most cloud cover are February and December (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in December - Deans, NJ
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).