December weather forecast
Blytheburn, PA

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Weather in December

The first month of the winter, December, is also an icy month in Blytheburn, Pennsylvania, with temperature in the range of an average high of 36.9°F (2.7°C) and an average low of 25.9°F (-3.4°C).

Temperature

In Blytheburn, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 46.2°F (7.9°C) to a wintry 36.9°F (2.7°C). In December, the temperature in Blytheburn drops to an average of 25.9°F (-3.4°C) at night.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In December, the rain falls for 10.3 days. Throughout December, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 162.5 rainfall days, and 30.35" (771mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Blytheburn, during December, snow falls for 7.8 days and regularly aggregates up to 3.5" (89mm) of snow. Throughout the year, there are 41.1 snowfall days, and 21.38" (543mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:10 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:45 pm EST.

Sunshine

In Blytheburn, the average sunshine in December is 3.8h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

In Blytheburn, in December, the average high-temperature is 36.9°F (2.7°C), and the average low-temperature is 25.9°F (-3.4°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in July is estimated at 86°F (30°C).

What is the average humidity in December?

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

How much does it rain in December?

In Blytheburn, during December, the rain falls for 10.3 days and regularly aggregates up to 2.2" (56mm) of precipitation.

How many days does it snow in December?

In Blytheburn, in December, during 7.8 snowfall days, 3.5" (89mm) of snow is typically accumulated.

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 Blytheburn have in December?

In Blytheburn, the average day length in December is 9h and 16min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:10 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:45 pm EST.

How long on average sun shines in December?

In Blytheburn, the average sunshine duration in December is 3.8h.

When is the lowest UV index?

The month with the lowest UV index in Blytheburn is December, with an average maximum UV index of 1.

How high is the UV index in December?

In Blytheburn, the average daily maximum UV index in December is 1. 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
Blytheburn, PA

Average temperature in December - Blytheburn, PA
  • Average high temperature in December: 36.9°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in December
Blytheburn, PA

Average pressure in December - Blytheburn, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Blytheburn, PA

Average wind speed in December - Blytheburn, PA
  • Average wind speed in December: 7.6mph

The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in December
Blytheburn, PA

Average humidity in December - Blytheburn, PA
  • Average humidity in December: 83%

The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (78%).

Average rainfall in December
Blytheburn, PA

Average rainfall in December - Blytheburn, PA
  • Average rainfall in December: 2.2"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and September (2.09").

Average rainfall days in December
Blytheburn, PA

Average rainfall days in December - Blytheburn, PA
  • Average rainfall days in December: 10.3 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.2 days).

Average snowfall in December
Blytheburn, PA

Average snowfall in December - Blytheburn, PA
  • Average snowfall in December: 3.5"

The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Blytheburn, PA

Average snowfall days in December - Blytheburn, PA
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Blytheburn, PA

Average daylight in December / Average sunshine in December - Blytheburn, PA
  • 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: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).

Average sunshine days in December
Blytheburn, PA

Average sunshine days in December - Blytheburn, PA
  • Average sunshine days in December: 15.4 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.1 days).

Average UV index in December
Blytheburn, PA

Average UV index in December - Blytheburn, PA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Blytheburn, PA

Average cloud cover in December - Blytheburn, PA
  • Average cloud cover in December: 60

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in December
Blytheburn, PA

Average visibility in December - Blytheburn, 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).

Blytheburn, Pennsylvania, USA

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