Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The beginning of December brings a slight decrease in the average high-temperature, transitioning from a fresh 52.5°F (11.4°C) in November to a chilly 44.8°F (7.1°C). December nights witness a mild cool down to an average low of 37°F (2.8°C).Humidity
In Moriches, the average relative humidity in December is 74%.Rainfall
December is the month with the most rainfall. Rain falls for 12.8 days and accumulates 3.31" (84mm) of precipitation.Snowfall
Months with snowfall in Moriches, New York, are January through April, November and December. In Moriches, during December, snow falls for 3.4 days and regularly aggregates up to 0.63" (16mm) of snow. Throughout the year, there are 17.9 snowfall days, and 4.57" (116mm) of snow is accumulated.Ocean temperature
In Moriches, the average seawater temperature in December is 48.9°F (9.4°C).Note: Without suitable protection, venturing into 48.9°F (9.4°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.
Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Moriches, New York.On the first day of the month, sunrise is at 6:56 am and sunset at 4:24 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:33 pm EST.
Sunshine
The average sunshine in December in Moriches is 4.9h.UV index
The months with the lowest UV index in Moriches are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Stay sun-safe with clothing that is both closely woven and worn loosely. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Moriches?
What is the average humidity in December in Moriches?
What is the rainiest month in Moriches?
How much does it rain in Moriches in December?
How many days does it snow in December in Moriches?
What is the ocean temperature in December in Moriches?
What is the month with the shortest days in Moriches?
How many hours of daylight does Moriches have in December?
When are sunrise and sunset in December in Moriches?
How many hours of sunshine does Moriches have in December?
What is the month with the lowest UV index in Moriches?
What is the UV index reading in December in Moriches?
Average temperature in December
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
The 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).
Average pressure in December
Moriches, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
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).
Average humidity in December
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%).
Average rainfall in December
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").
Average rainfall days in December
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).
Average snowfall in December
Moriches, NY
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Moriches, NY
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
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).
Average daylight in December /
Average sunshine in December
Moriches, NY
- 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 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
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).
Average UV index in December
Moriches, NY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in December
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).
Average visibility in December
Moriches, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Moriches, New York, USA
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