December weather forecast
Brooklyn, NY

Weather in December

December, the first month of the winter, in Brooklyn, is also a frosty month, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 43.2°F (6.2°C).

Temperature

In Brooklyn, the average high-temperature slightly decreases, from a fresh 52°F (11.1°C) in November, to a chilly 43.2°F (6.2°C). In Brooklyn, the average low-temperature is 34.7°F (1.5°C).

Humidity

In December, the average relative humidity in Brooklyn is 75%.

Rainfall

In December, in Brooklyn, the rain falls for 8.2 days. Throughout December, 0.94" (24mm) of precipitation is accumulated. Throughout the year, in Brooklyn, there are 110.8 rainfall days, and 10.39" (264mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Brooklyn, New York, are January through April and December. December is the first month it typically snows in Brooklyn, New York. Throughout December, in the average 2.3 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 13 snowfall days, and 1.3" (33mm) of snow is accumulated.

Ocean temperature

In Brooklyn, the average water temperature is 48°F (8.9°C).
Note: Swimming in 48°F (8.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

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

Sunshine

The average sunshine is 5h.

UV index

Months with the lowest UV index in Brooklyn are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
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. 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.
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FAQ

What is the average humidity in December in Brooklyn?

In December, the average relative humidity in Brooklyn is 75%.

How much does it rain in Brooklyn in December?

In Brooklyn, New York, during December, the rain falls for 8.2 days and regularly aggregates up to 0.94" (24mm) of precipitation.

When does it start to snow in Brooklyn?

December is the first month it typically snows. Throughout December, in the average 2.3 snowfall days, it receives 0.2" (5mm) of snow.

How cold is the water in December in Brooklyn?

In Brooklyn, in December, the average water temperature is 48°F (8.9°C). Swimming in 48°F (8.9°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Brooklyn?

With an average of 9.3h of daylight, December has the shortest days of the year in Brooklyn, New York.

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

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

How long on average sun shines in December in Brooklyn?

In December, the average sunshine is 5h.

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

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

How high is the UV index in December in Brooklyn?

In December, the average daily maximum UV index in Brooklyn, New York, is 2. A UV Index reading of 2, and below, represents a low health threat from the exposure to the Sun's UV rays.

Average temperature in December
Brooklyn, NY

Average temperature in December - Brooklyn, NY
  • Average high temperature in December: 6.2°C

The warmest month (with the highest average high temperature) is July (27.5°C).
The month with the lowest average high temperature is January (2.8°C).

  • Average low temperature in December: 1.5°C

The month with the highest average low temperature is July (21.3°C).
The coldest month (with the lowest average low temperature) is January (-2.4°C).

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Average pressure in December
Brooklyn, NY

Average pressure in December - Brooklyn, NY
  • Average pressure in December: 1018.4mbar

The month with the highest atmospheric pressure is November (1019.4mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

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Average wind speed in December
Brooklyn, NY

Average wind speed in December - Brooklyn, NY
  • Average wind speed in December: 17.3km/h

The windiest month (with the highest average wind speed) is January (18.1km/h).
The calmest month (with the lowest average wind speed) is July (11.9km/h).

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Average humidity in December
Brooklyn, NY

Average humidity in December - Brooklyn, NY
  • Average humidity in December: 75%

Months with the highest relative humidity are February, May and June (76%).
Months with the lowest relative humidity are August and November (72%).

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Average rainfall in December
Brooklyn, NY

Average rainfall in December - Brooklyn, NY
  • Average rainfall in December: 24mm

The wettest month (with the highest rainfall) is July (34mm).
The driest month (with the least rainfall) is September (13mm).

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Average rainfall days in December
Brooklyn, NY

Average rainfall days in December - Brooklyn, NY
  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is January (4.9 days).

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Average snowfall in December
Brooklyn, NY

Average snowfall in December - Brooklyn, NY
  • Average snowfall in December: 5mm

The month with the highest snowfall is March (14mm).
Months with the least snowfall are May, June, July, August, September, October and November (0mm).

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Average snowfall days in December
Brooklyn, NY

Average snowfall days in December - Brooklyn, NY
  • Average snowfall days in December: 2.3 days

Months with the highest number of snowfall days are January and February (3.6 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in December
Brooklyn, NY

Average sea temperature in December - Brooklyn, NY
  • Average sea temperature in December: 8.9°C

The best month for swimming (with the highest average sea temperature) is August (23.4°C).
The coldest month (with the lowest average sea temperature) is February (4.4°C).

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Average daylight in December /
Average sunshine in December
Brooklyn, NY

Average daylight in December / Average sunshine in December - Brooklyn, NY
  • 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: 5h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in December
Brooklyn, NY

Average sunshine days in December - Brooklyn, NY
  • Average sunshine days in December: 20.6 days

The month with the most sunshine days is January (22 days).
The month with the least sunshine days is June (16 days).

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Average UV index in December
Brooklyn, NY

Average UV index in December - Brooklyn, NY
  • 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
Brooklyn, NY

Average cloud cover in December - Brooklyn, NY
  • Average cloud cover in December: 47

Months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Brooklyn, NY

Average visibility in December - Brooklyn, NY
  • Average visibility in December: 9km

Months with the highest visibility are August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April, May, June, July and December (9km).

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