December weather forecast
Westfield, NY

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Weather in December

The first month of the winter, December, is still a cold month in Westfield, New York, with an average temperature ranging between max 36.5°F (2.5°C) and min 29.3°F (-1.5°C).

Temperature

In December, the meteorological conditions change slightly, with the average high-temperature moving from a chilly 45.3°F (7.4°C) in November to an icy 36.5°F (2.5°C). The December nights in Westfield show a slight decrease to a mean low-temperature of 29.3°F (-1.5°C).

Humidity

In Westfield, the average relative humidity in December is 83%.

Rainfall

In Westfield, in December, during 11.4 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. In Westfield, during the entire year, the rain falls for 176.3 days and collects up to 34.65" (880mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Westfield, in December, snow falls for 13.1 days, with typically accumulated 3.7" (94mm) of snow. Throughout the year, in Westfield, there are 66.8 snowfall days, and 22.72" (577mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature in Westfield is 41.4°F (5.2°C).
Note: Being in 41.4°F (5.2°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of December, sunrise is at 7:28 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:56 pm EST.

Sunshine

In December, the average sunshine in Westfield, New York, is 2.7h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Westfield. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 1 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Frequently asked questions

How cold is it in Westfield in December?

During December, Westfield experiences an average high-temperature of 36.5°F (2.5°C) and a low-temperature of 29.3°F (-1.5°C).

What is the average humidity in December in Westfield?

In Westfield, the average relative humidity in December is 83%.

How many days does it rain in December in Westfield?

In December, in Westfield, New York, the rain falls for 11.4 days. Throughout December, 2.99" (76mm) of precipitation is accumulated.

How many days does it snow in December in Westfield?

In Westfield, in December, during 13.1 snowfall days, 3.7" (94mm) of snow is typically accumulated.

What is the water temperature in December in Westfield?

In Westfield, in December, the average water temperature is 41.4°F (5.2°C). 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.

What is the month with the shortest days in Westfield?

December has the shortest days of the year in Westfield, with an average of 9h and 6min of daylight.

How many hours of daylight does Westfield have in December?

In Westfield, New York, the average day length in December is 9h and 8min.

When are sunrise and sunset in December in Westfield?

On the first day of December, sunrise is at 7:28 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:56 pm EST.

How many hours of sunshine does Westfield have in December?

The average sunshine duration in December in Westfield, New York, is 2.7h.

What is the month with the lowest UV index in Westfield?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December in Westfield?

In December, the average daily maximum UV index in Westfield is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
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
Westfield, NY

Average temperature in December - Westfield, NY
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

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Average pressure in December
Westfield, NY

Average pressure in December - Westfield, 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
Westfield, NY

Average wind speed in December - Westfield, NY
  • Average wind speed in December: 13.8mph

The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).

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Average humidity in December
Westfield, NY

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

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are September, October and November (78%).

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Average rainfall in December
Westfield, NY

Average rainfall in December - Westfield, NY
  • Average rainfall in December: 2.99"

The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.2").

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Average rainfall days in December
Westfield, NY

Average rainfall days in December - Westfield, NY
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is October (18.9 days).
The month with the least rainy days is January (8.7 days).

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Average snowfall in December
Westfield, NY

Average snowfall in December - Westfield, NY
  • Average snowfall in December: 3.7"

The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Westfield, NY

Average snowfall days in December - Westfield, NY
  • Average snowfall days in December: 13.1 days

The month with the highest number of snowfall days is January (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in December
Westfield, NY

Average sea temperature in December - Westfield, NY
  • Average sea temperature in December: 41.3°F

The best month for swimming (with the highest average sea temperature) is August (75.1°F).
The coldest month (with the lowest average sea temperature) is February (33.2°F).

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

Average daylight in December / Average sunshine in December - Westfield, NY
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 2h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in December
Westfield, NY

Average sunshine days in December - Westfield, NY
  • Average sunshine days in December: 6.8 days

The month with the most sunshine days is September (13.2 days).
The month with the least sunshine days is January (5.3 days).

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Average UV index in December
Westfield, NY

Average UV index in December - Westfield, NY
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Westfield, NY

Average cloud cover in December - Westfield, NY
  • Average cloud cover in December: 73

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Westfield, NY

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

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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Westfield, New York, USA

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