December weather forecast and climate
Bernardsville, NJ

Weather in December

The first month of the winter, December, is also a wintry month in Bernardsville, New Jersey, with average temperature ranging between max 41.2°F (5.1°C) and min 29.7°F (-1.3°C).

Temperature

In December, the average high-temperature drops, from a fresh 50.4°F (10.2°C) in November, to a wintry 41.2°F (5.1°C). In Bernardsville, the average low-temperature is 29.7°F (-1.3°C).

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Bernardsville, during 9.9 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 155.7 rainfall days, and 27.64" (702mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. In Bernardsville, in December, snow falls for 3.7 days, with typically accumulated 1.34" (34mm) of snow. In Bernardsville, New Jersey, during the entire year, snow falls for 24.7 days, and aggregates up to 10.83" (275mm) of snow.

Daylight

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

Sunshine

In December, the average sunshine is 4.8h.

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 of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Bernardsville?

The average high-temperature, in December, in Bernardsville, is 41.2°F (5.1°C), while the average low-temperature is 29.7°F (-1.3°C).

What is the average humidity in December in Bernardsville?

In Bernardsville, New Jersey, the average relative humidity in December is 79%.

How many days does it rain in December in Bernardsville?

In December, the rain falls for 9.9 days. Throughout December, 2.56" (65mm) of precipitation is accumulated.

How many days does it snow in December in Bernardsville?

In Bernardsville, New Jersey, during December, snow falls for 3.7 days and regularly aggregates up to 1.34" (34mm) of snow.

What is the month with the shortest days in Bernardsville?

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

How many hours of daylight does Bernardsville have in December?

The average length of the day in December in Bernardsville is 9.3h.

How many hours of sunshine does Bernardsville have in December?

The average sunshine in December is 4.8h.

What is the month with the lowest UV index in Bernardsville?

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

How high is the UV index in December in Bernardsville?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Bernardsville, NJ

Average temperature in December - Bernardsville, NJ
  • Average high temperature in December: 41.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in December
Bernardsville, NJ

Average pressure in December - Bernardsville, NJ
  • Average pressure in December: 30.08"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in December
Bernardsville, NJ

Average wind speed in December - Bernardsville, NJ
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in December
Bernardsville, NJ

Average humidity in December - Bernardsville, NJ
  • Average humidity in December: 79%

Months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in December
Bernardsville, NJ

Average rainfall in December - Bernardsville, NJ
  • Average rainfall in December: 2.56"

The wettest month (with the highest rainfall) is July (3.11").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in December
Bernardsville, NJ

Average rainfall days in December - Bernardsville, NJ
  • Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in December
Bernardsville, NJ

Average snowfall in December - Bernardsville, NJ
  • Average snowfall in December: 1.34"

The month with the highest snowfall is March (4.09").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Bernardsville, NJ

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

The month with the highest number of snowfall days is January (7.2 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Bernardsville, NJ

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

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in December
Bernardsville, NJ

Average sunshine days in December - Bernardsville, NJ
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.2 days).

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Average UV index in December
Bernardsville, NJ

Average UV index in December - Bernardsville, 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).

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Average cloud cover in December
Bernardsville, NJ

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

Months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in December
Bernardsville, NJ

Average visibility in December - Bernardsville, NJ
  • Average visibility in December: 6mi

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

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