Manorhaven
New York, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Manorhaven, NY

December, the first month of the winter, in Manorhaven, is also a wintry month, with average temperature ranging between min 33.8°F (1°C) and max 42.1°F (5.6°C).

Temperature

In December, the average high-temperature slightly decreases, from a cool 50.9°F (10.5°C) in November, to a cold 42.1°F (5.6°C). The average low-temperature, is 33.8°F (1°C).

Humidity

Months with the highest humidity in Manorhaven are February, May and December, with an average relative humidity of 75%.

Rainfall

The month with the most rainfall is December when the rain falls for 13 days and typically aggregates up to 3.98" (101mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Manorhaven. In Manorhaven, during 3.9 snowfall days, 1.69" (43mm) of snow is typically accumulated. In Manorhaven, during the entire year, snow falls for 23 days, and aggregates up to 8.23" (209mm) of snow.

Ocean temperature

In Manorhaven, the average seawater temperature in December is 48°F (8.9°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The month with the shortest days in Manorhaven, New York, is December, with an average of 9.3h of daylight.

Sunshine

The average sunshine in Manorhaven is 4.9h.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
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.

What is the temperature in December in Manorhaven?

In December, in Manorhaven, New York, the average high-temperature is 42.1°F (5.6°C), and the average low-temperature is 33.8°F (1°C).

What are the most humid months in Manorhaven?

February, May and December, with an average relative humidity of 75%, are most humid months in Manorhaven, New York.

What is the average humidity in December in Manorhaven?

The average relative humidity in December is 75%.

How many days does it rain in December in Manorhaven?

In Manorhaven, New York, in December, during 13 rainfall days, 3.98" (101mm) of precipitation is typically accumulated.

What is the wettest month in Manorhaven?

The month with the most rainfall in Manorhaven is December when the rain falls for 13 days and typically aggregates up to 3.98" (101mm) of precipitation.

How much does it snow in Manorhaven in December?

In December, in Manorhaven, New York, it is snowing for 3.9 days. Throughout December, 1.69" (43mm) of snow is accumulated.

What is the water temperature in December in Manorhaven?

In December, the average ocean temperature in Manorhaven 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 Manorhaven?

The month with the shortest days is December, with an average of 9.3h of daylight.

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

In December, the average length of the day in Manorhaven, New York, is 9.3h.

How many hours of sunshine does Manorhaven have in December?

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

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

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

How high is the UV index in December in Manorhaven?

The average daily maximum UV index in December in Manorhaven, 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 - Manorhaven, NY
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in December: 33.8°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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

Months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (70%).

Average rainfall in December - Manorhaven, NY
  • Average rainfall in December: 3.98"

The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the lowest rainfall) is February (2.36").

Average rainfall days in December - Manorhaven, NY
  • Average rainfall days in December: 13 days

The month with the highest number of rainy days is July (17.8 days).
The month with the lowest number of rainy days is January (9.2 days).

Average snowfall in December - Manorhaven, NY
  • Average snowfall in December: 1.69"

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

Average snowfall days in December - Manorhaven, NY
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (7.5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in December - Manorhaven, NY
  • Average sea temperature in December: 48.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

Average daylight in December / Average sunshine in December - Manorhaven, NY
  • Average daylight in December: 9.3h

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

  • Average sunshine in December: 4.9h

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

Average UV index in December - Manorhaven, 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).