December weather forecast
Salem, NJ

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Weather in December

December, the first month of the winter in Salem, is still a chilly month, with an average temperature fluctuating between 34°F (1.1°C) and 45°F (7.2°C).

Temperature

December reveals a small adjustment in temperature, transitioning from an average high of a cool 53.8°F (12.1°C) in November to a chilly 45°F (7.2°C). In the month of December, Salem records a consistent average low-temperature of 34°F (1.1°C).

Humidity

In Salem, the average relative humidity in December is 76%.

Rainfall

In Salem, during December, the rain falls for 9.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, in Salem, there are 147.7 rainfall days, and 27.8" (706mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Salem are January through May, November and December. In December, it is snowing for 2.3 days. Throughout December, 0.51" (13mm) of snow is accumulated. Throughout the year, in Salem, New Jersey, there are 13.8 snowfall days, and 6.65" (169mm) 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 in Salem, New Jersey, sunrise is at 7:03 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:48 pm EST.

Sunshine

The average sunshine in December in Salem is 5.1h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. To guard against the harmful effects of the Sun, minimize exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

What is the temperature in December in Salem?

The high-temperature in Salem, New Jersey, during December is 45°F (7.2°C) and the low-temperature is 34°F (1.1°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 91.4°F (33°C).

What is the average humidity in December in Salem?

In Salem, New Jersey, the average relative humidity in December is 76%.

How much does it rain in Salem in December?

In Salem, in December, it is raining for 9.8 days, with typically 2.68" (68mm) of accumulated precipitation.

How many days does it snow in December in Salem?

In Salem, in December, snow falls for 2.3 days, with typically accumulated 0.51" (13mm) of snow.

What is the month with the shortest days in Salem?

The month with the shortest days in Salem, New Jersey, is December, with an average of 9h and 24min of daylight.

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

In December, the average day length in Salem is 9h and 26min.

When are sunrise and sunset in December in Salem?

On the first day of December in Salem, New Jersey, sunrise is at 7:03 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:48 pm EST.

How many hours of sunshine does Salem have in December?

In Salem, New Jersey, the average sunshine duration in December is 5.1h.

What are the months with the lowest UV index in Salem?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Salem.

What is the UV index intensity in December in Salem?

The average daily maximum UV index in December in Salem, New Jersey, is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Salem, NJ

Average temperature in December - Salem, NJ
  • Average high temperature in December: 45°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in December: 34°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 (27°F).

Average pressure in December
Salem, NJ

Average pressure in December - Salem, 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
Salem, NJ

Average wind speed in December - Salem, 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 (5.7mph).

Average humidity in December
Salem, NJ

Average humidity in December - Salem, NJ
  • Average humidity in December: 76%

The months with the highest relative humidity are May, June, September and October (77%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Salem, NJ

Average rainfall in December - Salem, NJ
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is January (1.77").

Average rainfall days in December
Salem, NJ

Average rainfall days in December - Salem, NJ
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (8 days).

Average snowfall in December
Salem, NJ

Average snowfall in December - Salem, NJ
  • Average snowfall in December: 0.51"

The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Salem, NJ

Average snowfall days in December - Salem, NJ
  • Average snowfall days in December: 2.3 days

The month with the highest number of snowfall days is January (4.2 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
Salem, NJ

Average daylight in December / Average sunshine in December - Salem, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
Salem, NJ

Average sunshine days in December - Salem, NJ
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (20.6 days).
The months with the least sunshine days are May and July (11.8 days).

Average UV index in December
Salem, NJ

Average UV index in December - Salem, 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
Salem, NJ

Average cloud cover in December - Salem, NJ
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Salem, NJ

Average visibility in December - Salem, 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).

Salem, New Jersey, USA

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