December weather forecast
Cooper Corners, PA

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Weather in December

December, the first month of the winter in Cooper Corners, is still a cold month, with an average temperature ranging between max 35.8°F (2.1°C) and min 25.7°F (-3.5°C).

Temperature

Setting in of December comes with a decrease in the average high-temperature, moving from a frosty 45.7°F (7.6°C) in November to a cold 35.8°F (2.1°C). The nighttime temperature in Cooper Corners dips to a freezing cold 25.7°F (-3.5°C) on average during December.

Humidity

February and December, with an average relative humidity of 84%, are the most humid months.

Rainfall

In Cooper Corners, in December, during 9.6 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Cooper Corners, during the entire year, the rain falls for 153.7 days and collects up to 28.35" (720mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Cooper Corners, during December, snow falls for 9.6 days and regularly aggregates up to 4.13" (105mm) of snow. Throughout the year, there are 47.2 snowfall days, and 22.68" (576mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:11 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:43 pm EST.

Sunshine

In Cooper Corners, the average sunshine in December is 3.5h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 1 during December translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

In December, the average high-temperature and low-temperature are 35.8°F (2.1°C) and 25.7°F (-3.5°C) respectively. In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 86°F (30°C).

What are the most humid months?

February and December, with an average relative humidity of 84%, are most humid months in Cooper Corners.

What is the average humidity in December?

In December, the average relative humidity is 84%.

How much does it rain in December?

In December, the rain falls for 9.6 days. Throughout December, 2.01" (51mm) of precipitation is accumulated.

How much does it snow in December?

In Cooper Corners, during December, snow falls for 9.6 days and regularly aggregates up to 4.13" (105mm) of snow.

What is the month with the shortest days?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

How many hours of daylight does Cooper Corners have in December?

In December, the average day length is 9h and 13min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:43 pm EST.

How many hours of sunshine does Cooper Corners have in December?

In Cooper Corners, the average sunshine duration in December is 3.5h.

When is the lowest UV index?

With an average maximum UV index of 1, December is the month with the lowest UV index.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
Cooper Corners, PA

Average temperature in December - Cooper Corners, PA
  • Average high temperature in December: 35.8°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in December: 25.7°F

The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in December
Cooper Corners, PA

Average pressure in December - Cooper Corners, 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
Cooper Corners, PA

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

The windiest months (with the highest average wind speed) are January, February, March and April (8mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in December
Cooper Corners, PA

Average humidity in December - Cooper Corners, PA
  • Average humidity in December: 84%

The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April, June and July (78%).

Average rainfall in December
Cooper Corners, PA

Average rainfall in December - Cooper Corners, PA
  • Average rainfall in December: 2.01"

The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is January (1.77").

Average rainfall days in December
Cooper Corners, PA

Average rainfall days in December - Cooper Corners, PA
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (7 days).

Average snowfall in December
Cooper Corners, PA

Average snowfall in December - Cooper Corners, PA
  • Average snowfall in December: 4.13"

The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Cooper Corners, PA

Average snowfall days in December - Cooper Corners, PA
  • Average snowfall days in December: 9.6 days

The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Cooper Corners, PA

Average daylight in December / Average sunshine in December - Cooper Corners, PA
  • Average daylight in December: 9h and 1min

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 12min).

  • Average sunshine in December: 3h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in December
Cooper Corners, PA

Average sunshine days in December - Cooper Corners, PA
  • Average sunshine days in December: 15 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in December
Cooper Corners, PA

Average UV index in December - Cooper Corners, 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
Cooper Corners, PA

Average cloud cover in December - Cooper Corners, PA
  • Average cloud cover in December: 65

The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
Cooper Corners, PA

Average visibility in December - Cooper Corners, 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).

Cooper Corners, Pennsylvania, USA

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