December weather forecast
West Nyack, NY

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Weather in December

The first month of the winter, December, is also an icy month in West Nyack, New York, with an average temperature fluctuating between 30.7°F (-0.7°C) and 41°F (5°C).

Temperature

The arrival of December corresponds with a reduction in the average high-temperature, down from November's cool 50.9°F (10.5°C) to a cold 41°F (5°C). Throughout the month of December, West Nyack witnesses an average low-temperature of 30.7°F (-0.7°C).

Humidity

February and December, with an average relative humidity of 77%, are the most humid months.

Rainfall

In West Nyack, in December, it is raining for 10.4 days, with typically 3.11" (79mm) of accumulated precipitation. Throughout the year, in West Nyack, there are 151.8 rainfall days, and 30.79" (782mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In West Nyack, New York, in December, during 3.5 snowfall days, 1.85" (47mm) of snow is typically accumulated. Throughout the year, in West Nyack, there are 19 snowfall days, and 9.41" (239mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:02 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:37 pm EST.

Sunshine

The average sunshine in December in West Nyack, New York, is 4.9h.

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 value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

How cold does it get in West Nyack in December?

In West Nyack, 41°F (5°C) is the average high-temperature and 30.7°F (-0.7°C) is the average low-temperature during December. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 87.8°F (31°C).

What is the most humid month in West Nyack?

February and December, with an average relative humidity of 77%, are most humid months in West Nyack.

What is the average humidity in December in West Nyack?

The average relative humidity in December is 77%.

How much does it rain in West Nyack in December?

In December, in West Nyack, the rain falls for 10.4 days. Throughout December, 3.11" (79mm) of precipitation is accumulated.

How much does it snow in West Nyack in December?

In West Nyack, New York, during December, snow falls for 3.5 days and regularly aggregates up to 1.85" (47mm) of snow.

What is the month with the shortest days in West Nyack?

With an average of 9h and 18min of daylight, December has the shortest days of the year in West Nyack.

What is the average length of the day in December in West Nyack?

In December, the average day length in West Nyack, New York, is 9h and 17min.

When is the sunrise / sunset in December in West Nyack?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:28 pm. On the last day of the month, in West Nyack, sunrise is at 7:20 am and sunset at 4:37 pm EST.

How long on average sun shines in December in West Nyack?

The average sunshine duration in December in West Nyack is 4.9h.

What are the months with the lowest UV index in West Nyack?

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 West Nyack?

In West Nyack, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
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
West Nyack, NY

Average temperature in December - West Nyack, NY
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 30.7°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in December
West Nyack, NY

Average pressure in December - West Nyack, NY
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
West Nyack, NY

Average wind speed in December - West Nyack, NY
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in December
West Nyack, NY

Average humidity in December - West Nyack, NY
  • Average humidity in December: 77%

The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is August (70%).

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Average rainfall in December
West Nyack, NY

Average rainfall in December - West Nyack, NY
  • Average rainfall in December: 3.11"

The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is January (1.89").

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Average rainfall days in December
West Nyack, NY

Average rainfall days in December - West Nyack, NY
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in December
West Nyack, NY

Average snowfall in December - West Nyack, NY
  • Average snowfall in December: 1.85"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
West Nyack, NY

Average snowfall days in December - West Nyack, NY
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
West Nyack, NY

Average daylight in December / Average sunshine in December - West Nyack, 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 month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
West Nyack, NY

Average sunshine days in December - West Nyack, NY
  • Average sunshine days in December: 17.6 days

The months with the most sunshine days are January and November (20 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in December
West Nyack, NY

Average UV index in December - West Nyack, 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, November and December (UV index 2).

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Average cloud cover in December
West Nyack, NY

Average cloud cover in December - West Nyack, NY
  • Average cloud cover in December: 48

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
West Nyack, NY

Average visibility in December - West Nyack, 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).

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West Nyack, New York, USA

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