December weather forecast
Copella, PA

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Weather in December

December, the first month of the winter in Copella, is also a wintry month, with temperature in the range of an average low of 28°F (-2.2°C) and an average high of 39°F (3.9°C).

Temperature

With December's arrival, Copella's weather changes as the average high-temperature falls from a frosty 48.6°F (9.2°C) in November to a wintry 39°F (3.9°C). Throughout December, the nighttime temperature in Copella averages to a subzero cold 28°F (-2.2°C).

Humidity

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

Rainfall

In December, the rain falls for 13.1 days. Throughout December, 3.19" (81mm) of precipitation is accumulated. In Copella, Pennsylvania, during the entire year, the rain falls for 167 days and collects up to 33.5" (851mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Copella, in December, during 6.1 snowfall days, 3.19" (81mm) of snow is typically accumulated. Throughout the year, there are 33.8 snowfall days, and 17.91" (455mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year in Copella.
On the first day of December, sunrise is at 7:07 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:43 pm EST.

Sunshine

In Copella, the average sunshine in December is 4.7h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 1 in December suggests the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

Is it cold in Copella during December?

The high-temperature during December is 39°F (3.9°C) and the low-temperature is 28°F (-2.2°C). In July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is evaluated at 89.6°F (32°C).

What is the average humidity in December in Copella?

The average relative humidity in December in Copella is 81%.

How many days does it rain in December in Copella?

In Copella, Pennsylvania, in December, it is raining for 13.1 days, with typically 3.19" (81mm) of accumulated precipitation.

How many days does it snow in December in Copella?

In Copella, Pennsylvania, in December, snow falls for 6.1 days, with typically accumulated 3.19" (81mm) of snow.

What is the month with the shortest days in Copella?

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

How many hours of daylight does Copella have in December?

In Copella, Pennsylvania, the average day length in December is 9h and 19min.

When is the sunrise / sunset in December in Copella?

On the first day of December in Copella, Pennsylvania, sunrise is at 7:07 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:43 pm EST.

How many hours of sunshine does Copella have in December?

In Copella, the average sunshine duration in December is 4.7h.

When is the lowest UV index in Copella?

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

What is the UV index intensity in December in Copella?

In December, the average daily maximum UV index in Copella, Pennsylvania, is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Copella, PA

Average temperature in December - Copella, PA
  • Average high temperature in December: 39°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

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Average pressure in December
Copella, PA

Average pressure in December - Copella, 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).

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Average wind speed in December
Copella, PA

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

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in December
Copella, PA

Average humidity in December - Copella, PA
  • Average humidity in December: 81%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in December
Copella, PA

Average rainfall in December - Copella, PA
  • Average rainfall in December: 3.19"

The wettest month (with the highest rainfall) is July (3.46").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in December
Copella, PA

Average rainfall days in December - Copella, PA
  • Average rainfall days in December: 13.1 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (9.9 days).

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Average snowfall in December
Copella, PA

Average snowfall in December - Copella, PA
  • Average snowfall in December: 3.19"

The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Copella, PA

Average snowfall days in December - Copella, PA
  • Average snowfall days in December: 6.1 days

The month with the highest number of snowfall days is January (9.6 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
Copella, PA

Average daylight in December / Average sunshine in December - Copella, 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: 4h and 4min

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

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Average sunshine days in December
Copella, PA

Average sunshine days in December - Copella, PA
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in December
Copella, PA

Average UV index in December - Copella, 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).

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Average cloud cover in December
Copella, PA

Average cloud cover in December - Copella, PA
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in December
Copella, PA

Average visibility in December - Copella, 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).

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Copella, Pennsylvania, USA

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