December weather forecast
Brass Castle, NJ

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Weather in December

The first month of the winter, December, is also a wintry month in Brass Castle, New Jersey, with an average temperature fluctuating between 28.4°F (-2°C) and 40.1°F (4.5°C).

Temperature

The arrival of December corresponds with a temperature reduction, down from November's frosty 49.8°F (9.9°C) to a wintry 40.1°F (4.5°C). During December, Brass Castle consistently records a temperature low averaging a freezing cold 28.4°F (-2°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In Brass Castle, in December, it is raining for 11.7 days, with typically 2.8" (71mm) of accumulated precipitation. Throughout the year, there are 157.6 rainfall days, and 28.7" (729mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 4.9 days. Throughout December, 2.4" (61mm) of snow is accumulated. In Brass Castle, during the entire year, snow falls for 30.4 days and aggregates up to 14.76" (375mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:33 pm. On the last day of December, in Brass Castle, sunrise is at 7:24 am and sunset at 4:42 pm EST.

Sunshine

The average sunshine in December is 4.7h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
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Frequently asked questions

How cold does it get in Brass Castle in December?

In Brass Castle, 40.1°F (4.5°C) is the average high-temperature and 28.4°F (-2°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, in August is estimated at 86°F (30°C).

What is the average humidity in December in Brass Castle?

In December, the average relative humidity in Brass Castle, New Jersey, is 80%.

How many days does it rain in December in Brass Castle?

In December, in Brass Castle, the rain falls for 11.7 days. Throughout December, 2.8" (71mm) of precipitation is accumulated.

How much does it snow in Brass Castle in December?

In Brass Castle, during December, snow falls for 4.9 days and regularly aggregates up to 2.4" (61mm) of snow.

What is the month with the shortest days in Brass Castle?

The month with the shortest days in Brass Castle is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Brass Castle have in December?

The average day length in December is 9h and 19min.

What time are sunrise and sunset in December in Brass Castle?

On the first day of December in Brass Castle, sunrise is at 7:05 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:42 pm EST.

How many hours of sunshine does Brass Castle have in December?

In December, the average sunshine duration in Brass Castle is 4.7h.

What are the months with the lowest UV index in Brass Castle?

The months with the lowest UV index in Brass Castle, New Jersey, are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Brass Castle?

In Brass Castle, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Brass Castle, NJ

Average temperature in December - Brass Castle, NJ
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in December
Brass Castle, NJ

Average pressure in December - Brass Castle, 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 (29.93"Hg).

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Average wind speed in December
Brass Castle, NJ

Average wind speed in December - Brass Castle, NJ
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Brass Castle, NJ

Average humidity in December - Brass Castle, NJ
  • Average humidity in December: 80%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in December
Brass Castle, NJ

Average rainfall in December - Brass Castle, NJ
  • Average rainfall in December: 2.8"

The wettest month (with the highest rainfall) is July (2.87").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in December
Brass Castle, NJ

Average rainfall days in December - Brass Castle, NJ
  • Average rainfall days in December: 11.7 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (8.1 days).

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Average snowfall in December
Brass Castle, NJ

Average snowfall in December - Brass Castle, NJ
  • Average snowfall in December: 2.4"

The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Brass Castle, NJ

Average snowfall days in December - Brass Castle, NJ
  • Average snowfall days in December: 4.9 days

The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Brass Castle, NJ

Average daylight in December / Average sunshine in December - Brass Castle, NJ
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Brass Castle, NJ

Average sunshine days in December - Brass Castle, NJ
  • Average sunshine days in December: 16 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (11.8 days).

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Average UV index in December
Brass Castle, NJ

Average UV index in December - Brass Castle, NJ
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The 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
Brass Castle, NJ

Average cloud cover in December - Brass Castle, NJ
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in December
Brass Castle, NJ

Average visibility in December - Brass Castle, NJ
  • Average visibility in December: 5mi

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

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Brass Castle, New Jersey, USA

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