December weather forecast
Westtown, NY

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Weather in December

The first month of the winter, December, is also an icy month in Westtown, New York, with an average temperature fluctuating between 37.8°F (3.2°C) and 25.9°F (-3.4°C).

Temperature

The onset of December entails a temperature shift, as the average high-temperature decreases from a frosty 47.7°F (8.7°C) in November to a wintry 37.8°F (3.2°C). Throughout the nights in December, an average low-temperature of 25.9°F (-3.4°C) is noted in Westtown, New York.

Humidity

December is the most humid month, with an average relative humidity of 83%.

Rainfall

In Westtown, in December, during 10.5 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in Westtown, there are 153.7 rainfall days, and 30.75" (781mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Westtown are January through May, October through December. In Westtown, in December, during 6.3 snowfall days, 3.78" (96mm) of snow is typically accumulated. Throughout the year, in Westtown, there are 32.5 snowfall days, and 19.13" (486mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Westtown, New York, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:05 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:38 pm EST.

Sunshine

In December, the average sunshine in Westtown is 4.5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Enhance your sun protection with tightly woven, yet airy clothing. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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Frequently asked questions

How cold is December in Westtown?

In December, in Westtown, the average high-temperature is 37.8°F (3.2°C), and the average low-temperature is 25.9°F (-3.4°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in July is estimated at 89.6°F (32°C).

What is the most humid month in Westtown?

December is the most humid month in Westtown, New York, with an average relative humidity of 83%.

What is the average humidity in December in Westtown?

The average relative humidity in December in Westtown is 83%.

How much does it rain in Westtown in December?

In Westtown, New York, during December, the rain falls for 10.5 days and regularly aggregates up to 2.8" (71mm) of precipitation.

How much does it snow in Westtown in December?

In Westtown, in December, during 6.3 snowfall days, 3.78" (96mm) of snow is typically accumulated.

What is the month with the shortest days in Westtown?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Westtown have in December?

In December, the average day length is 9h and 15min.

What time are sunrise and sunset in December in Westtown?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:29 pm. On the last day of the month, in Westtown, New York, sunrise is at 7:23 am and sunset at 4:38 pm EST.

How many hours of sunshine does Westtown have in December?

In Westtown, the average sunshine duration in December is 4.5h.

When is the lowest UV index in Westtown?

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

What is the UV index intensity in December in Westtown?

The average daily maximum UV index in December in Westtown is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health 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
Westtown, NY

Average temperature in December - Westtown, NY
  • Average high temperature in December: 37.8°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 (32°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in December
Westtown, NY

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

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Westtown, NY

Average wind speed in December - Westtown, NY
  • Average wind speed in December: 6.8mph

The windiest months (with the highest average wind speed) are January, February and March (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in December
Westtown, NY

Average humidity in December - Westtown, NY
  • Average humidity in December: 83%

The month with the highest relative humidity is December (83%).
The months with the lowest relative humidity are April and July (77%).

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Average rainfall in December
Westtown, NY

Average rainfall in December - Westtown, NY
  • Average rainfall in December: 2.8"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in December
Westtown, NY

Average rainfall days in December - Westtown, NY
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in December
Westtown, NY

Average snowfall in December - Westtown, NY
  • Average snowfall in December: 3.78"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Westtown, NY

Average snowfall days in December - Westtown, NY
  • Average snowfall days in December: 6.3 days

The month with the highest number of snowfall days is February (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Westtown, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in December
Westtown, NY

Average sunshine days in December - Westtown, NY
  • Average sunshine days in December: 17.1 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (11 days).

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Average UV index in December
Westtown, NY

Average UV index in December - Westtown, NY
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 5).
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
Westtown, NY

Average cloud cover in December - Westtown, NY
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 36).

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Average visibility in December
Westtown, NY

Average visibility in December - Westtown, NY
  • Average visibility in December: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).

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Westtown, New York, USA

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