December weather forecast
West Finley, PA

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Weather in December

December, the first month of the winter in West Finley, is still a cold month, with temperature in the range of an average low of 28.6°F (-1.9°C) and an average high of 40.1°F (4.5°C).

Temperature

In West Finley, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 49.8°F (9.9°C) to a cold 40.1°F (4.5°C). During December, the temperature is averaged to a low of 28.6°F (-1.9°C) at night.

Humidity

The average relative humidity in December is 83%.

Rainfall

In West Finley, in December, during 13.2 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In West Finley, during the entire year, the rain falls for 184.2 days and collects up to 35.75" (908mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In West Finley, in December, snow falls for 12.9 days, with typically accumulated 5" (127mm) of snow. In West Finley, Pennsylvania, during the entire year, snow falls for 61.5 days and aggregates up to 25.98" (660mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:57 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:06 pm EST.

Sunshine

In West Finley, the average sunshine in December is 3.5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.

Frequently asked questions

Is December cold?

The high-temperature, in December, in West Finley, records 40.1°F (4.5°C), while the low-temperature is 28.6°F (-1.9°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in August is appraised at 87.8°F (31°C).

What is the average humidity in December?

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

How much does it rain in December?

In West Finley, Pennsylvania, in December, it is raining for 13.2 days, with typically 3.11" (79mm) of accumulated precipitation.

How many days does it snow in December?

In West Finley, in December, during 12.9 snowfall days, 5" (127mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

How many hours of daylight does West Finley have in December?

The average day length in December is 9h and 23min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:06 pm EST.

How long on average sun shines in December?

In West Finley, the average sunshine duration in December is 3.5h.

What is the month with the lowest UV index?

January, February, 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 West Finley, 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 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
West Finley, PA

Average temperature in December - West Finley, PA
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in December
West Finley, PA

Average pressure in December - West Finley, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
West Finley, PA

Average wind speed in December - West Finley, PA
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in December
West Finley, PA

Average humidity in December - West Finley, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
West Finley, PA

Average rainfall in December - West Finley, PA
  • Average rainfall in December: 3.11"

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in December
West Finley, PA

Average rainfall days in December - West Finley, PA
  • Average rainfall days in December: 13.2 days

The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is January (10.7 days).

Average snowfall in December
West Finley, PA

Average snowfall in December - West Finley, PA
  • Average snowfall in December: 5"

The month with the highest snowfall is February (6.54").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
West Finley, PA

Average snowfall days in December - West Finley, PA
  • Average snowfall days in December: 12.9 days

The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
West Finley, PA

Average daylight in December / Average sunshine in December - West Finley, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 3h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
West Finley, PA

Average sunshine days in December - West Finley, PA
  • Average sunshine days in December: 10.4 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is January (7.5 days).

Average UV index in December
West Finley, PA

Average UV index in December - West Finley, PA
  • Average UV index in December: 2

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
West Finley, PA

Average cloud cover in December - West Finley, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
West Finley, PA

Average visibility in December - West Finley, PA
  • Average visibility in December: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

West Finley, Pennsylvania, USA

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