December weather forecast
Port Carbon, PA

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Weather in December

The first month of the winter, December, is still a cold month in Port Carbon, Pennsylvania, with an average temperature varying between 38.8°F (3.8°C) and 27.7°F (-2.4°C).

Temperature

During Port Carbon's transition into December, the average high-temperature lessens, moving from a frosty 48°F (8.9°C) in November to an icy 38.8°F (3.8°C). The low-temperature average for Port Carbon during December stands at a freezing cold 27.7°F (-2.4°C).

Humidity

The average relative humidity in December is 81%.

Rainfall

In December, the rain falls for 13.5 days. Throughout December, 2.87" (73mm) of precipitation is accumulated. In Port Carbon, during the entire year, the rain falls for 172.9 days and collects up to 34.21" (869mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Port Carbon, in December, during 6.9 snowfall days, 2.8" (71mm) of snow is typically accumulated. Throughout the year, there are 39.7 snowfall days, and 20.47" (520mm) 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 the month, sunrise is at 7:09 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:47 pm EST.

Sunshine

The months with the least sunshine are January, February and December, with an average of 4.4h of sunshine.

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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Enhance your sun protection with tightly woven, yet airy clothing. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.

Frequently asked questions

Is December cold?

In December, in Port Carbon, the average high-temperature is 38.8°F (3.8°C), and the average low-temperature is 27.7°F (-2.4°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is computed to be 87.8°F (31°C).

What is the average humidity in December?

In Port Carbon, the average relative humidity in December is 81%.

How many days does it rain in December?

In Port Carbon, in December, it is raining for 13.5 days, with typically 2.87" (73mm) of accumulated precipitation.

How many days does it snow in December?

In Port Carbon, in December, snow falls for 6.9 days, with typically accumulated 2.8" (71mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

How many hours of daylight does Port Carbon have in December?

The average day length in December is 9h and 19min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:09 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:47 pm EST.

What is the month with the least sunshine?

January, February and December, with an average of 4.4h of sunshine, are months with the least sunshine.

How many hours of sunshine does Port Carbon have in December?

In December, the average sunshine duration is 4.4h.

When is the lowest UV index?

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?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes 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
Port Carbon, PA

Average temperature in December - Port Carbon, PA
  • Average high temperature in December: 38.8°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in December
Port Carbon, PA

Average pressure in December - Port Carbon, PA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Port Carbon, PA

Average wind speed in December - Port Carbon, PA
  • Average wind speed in December: 7.7mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Port Carbon, PA

Average humidity in December - Port Carbon, PA
  • Average humidity in December: 81%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Port Carbon, PA

Average rainfall in December - Port Carbon, PA
  • Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (2.09").

Average rainfall days in December
Port Carbon, PA

Average rainfall days in December - Port Carbon, PA
  • Average rainfall days in December: 13.5 days

The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and November (10.8 days).

Average snowfall in December
Port Carbon, PA

Average snowfall in December - Port Carbon, PA
  • Average snowfall in December: 2.8"

The month with the highest snowfall is January (5.47").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Port Carbon, PA

Average snowfall days in December - Port Carbon, PA
  • Average snowfall days in December: 6.9 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Port Carbon, PA

Average daylight in December / Average sunshine in December - Port Carbon, 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 18min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 24min).

Average sunshine days in December
Port Carbon, PA

Average sunshine days in December - Port Carbon, PA
  • Average sunshine days in December: 14.2 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is May (9.6 days).

Average UV index in December
Port Carbon, PA

Average UV index in December - Port Carbon, PA
  • Average UV index in December: 2

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

Average cloud cover in December
Port Carbon, PA

Average cloud cover in December - Port Carbon, PA
  • Average cloud cover in December: 53

The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Port Carbon, PA

Average visibility in December - Port Carbon, PA
  • Average visibility in December: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

Port Carbon, Pennsylvania, USA

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