December weather forecast and climate
East Moriches, NY

Weather in December

The first month of the winter, December, is also a frosty month in East Moriches, New York, with average temperature varying between 44.8°F (7.1°C) and 37°F (2.8°C).

Temperature

In East Moriches, the average high-temperature in December slightly decreases, from a fresh 52.5°F (11.4°C) in November, to a chilly 44.8°F (7.1°C). In December, the average low-temperature is 37°F (2.8°C).

Humidity

In East Moriches, the average relative humidity is 74%.

Rainfall

The month with the most rainfall in East Moriches is December when the rain falls for 12.8 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In East Moriches, during December, snow falls for 3.4 days and regularly aggregates up to 0.63" (16mm) of snow. In East Moriches, during the entire year, snow falls for 17.9 days, and aggregates up to 4.57" (116mm) of snow.

Ocean temperature

In East Moriches, New York, the average seawater temperature is 48.9°F (9.4°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 is December, with an average of 9.3h of daylight.

Sunshine

The average sunshine in East Moriches, New York, is 4.9h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in East Moriches. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 2 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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 East Moriches?

In December, in East Moriches, the average high-temperature is 44.8°F (7.1°C), and the average low-temperature is 37°F (2.8°C).

What is the average humidity in December in East Moriches?

The average relative humidity in December is 74%.

How much does it rain in East Moriches in December?

In East Moriches, in December, during 12.8 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.

What is the wettest month in East Moriches?

The month with the most rainfall in East Moriches is December when the rain falls for 12.8 days and typically aggregates up to 3.31" (84mm) of precipitation.

How many days does it snow in December in East Moriches?

In East Moriches, in December, during 3.4 snowfall days, 0.63" (16mm) of snow is typically accumulated.

What is the ocean temperature in December in East Moriches?

In December, the average ocean temperature is 48.9°F (9.4°C). Swimming in 48.9°F (9.4°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 East Moriches?

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

What is the average length of the day in December in East Moriches?

The average length of the day in December in East Moriches, New York, is 9.3h.

How long on average sun shines in December in East Moriches?

The average sunshine in December in East Moriches is 4.9h.

When is the lowest UV index in East Moriches?

Months with the lowest UV index in East Moriches, New York, are January through March and December, with an average maximum UV index of 2.

What is the UV index reading in December in East Moriches?

In East Moriches, New York, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.

Average temperature in December
East Moriches, NY

Average temperature in December - East Moriches, NY
  • Average high temperature in December: 44.8°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in December: 37°F

Months with the highest average low temperature are July and August (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in December
East Moriches, NY

Average pressure in December - East Moriches, NY
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in December
East Moriches, NY

Average wind speed in December - East Moriches, NY
  • Average wind speed in December: 14mph

The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.6mph).

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Average humidity in December
East Moriches, NY

Average humidity in December - East Moriches, NY
  • Average humidity in December: 74%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in December
East Moriches, NY

Average rainfall in December - East Moriches, NY
  • Average rainfall in December: 3.31"

The wettest month (with the highest rainfall) is December (3.31").
The driest months (with the least rainfall) are January, February and September (2.01").

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Average rainfall days in December
East Moriches, NY

Average rainfall days in December - East Moriches, NY
  • Average rainfall days in December: 12.8 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (9 days).

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Average snowfall in December
East Moriches, NY

Average snowfall in December - East Moriches, NY
  • Average snowfall in December: 0.63"

The month with the highest snowfall is January (1.5").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
East Moriches, NY

Average snowfall days in December - East Moriches, NY
  • Average snowfall days in December: 3.4 days

The month with the highest number of snowfall days is February (5.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
East Moriches, NY

Average sea temperature in December - East Moriches, NY
  • Average sea temperature in December: 48.9°F

The best month for swimming (with the highest average sea temperature) is August (73.7°F).
The coldest month (with the lowest average sea temperature) is February (38°F).

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Average daylight in December /
Average sunshine in December
East Moriches, NY

Average daylight in December / Average sunshine in December - East Moriches, 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: 4.9h

Months with the most sunshine are July and August (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in December
East Moriches, NY

Average sunshine days in December - East Moriches, NY
  • Average sunshine days in December: 13.5 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is February (12.8 days).

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Average UV index in December
East Moriches, NY

Average UV index in December - East Moriches, 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 and December (UV index 2).

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Average cloud cover in December
East Moriches, NY

Average cloud cover in December - East Moriches, NY
  • Average cloud cover in December: 49

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in December
East Moriches, NY

Average visibility in December - East Moriches, NY
  • Average visibility in December: 6mi

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

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