December weather forecast
Commodore, PA

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Weather in December

December, the first month of the winter in Commodore, is also an icy month, with an average temperature fluctuating between 27°F (-2.8°C) and 37.4°F (3°C).

Temperature

In Commodore, entering December brings a temperature decrement, reducing from November's frosty 47.1°F (8.4°C) to a wintry 37.4°F (3°C). The nights of December anticipate an average low-temperature of 27°F (-2.8°C).

Humidity

The average relative humidity in December is 85%.

Rainfall

In December, the rain falls for 11.9 days. Throughout December, 2.76" (70mm) of precipitation is accumulated. Throughout the year, there are 183.5 rainfall days, and 33.46" (850mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Commodore, during December, snow falls for 13.1 days and regularly aggregates up to 5.67" (144mm) of snow. In Commodore, during the entire year, snow falls for 67.3 days and aggregates up to 28.62" (727mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:21 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:58 pm EST.

Sunshine

In Commodore, the average sunshine in December is 3.2h.

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 low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.

Frequently asked questions

How cold is it in December?

December temperatures vary between a high-temperature of 37.4°F (3°C) and a low-temperature of 27°F (-2.8°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 85%.

How many days does it rain in December?

In Commodore, in December, during 11.9 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Commodore, during December, snow falls for 13.1 days and regularly aggregates up to 5.67" (144mm) of snow.

What is the month with the shortest days?

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

How many hours of daylight does Commodore have in December?

In Commodore, 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 7:21 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:58 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 3.2h.

What is the month with the lowest UV index in Commodore?

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

What is the UV index reading in December?

In Commodore, Pennsylvania, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat 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
Commodore, PA

Average temperature in December - Commodore, PA
  • Average high temperature in December: 37.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average pressure in December
Commodore, PA

Average pressure in December - Commodore, 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 (29.95"Hg).

Average wind speed in December
Commodore, PA

Average wind speed in December - Commodore, PA
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Commodore, PA

Average humidity in December - Commodore, PA
  • Average humidity in December: 85%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, June, July and August (78%).

Average rainfall in December
Commodore, PA

Average rainfall in December - Commodore, PA
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.93").

Average rainfall days in December
Commodore, PA

Average rainfall days in December - Commodore, PA
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is May (21.5 days).
The month with the least rainy days is January (9.1 days).

Average snowfall in December
Commodore, PA

Average snowfall in December - Commodore, PA
  • Average snowfall in December: 5.67"

The month with the highest snowfall is January (7.05").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Commodore, PA

Average snowfall days in December - Commodore, PA
  • Average snowfall days in December: 13.1 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
Commodore, PA

Average daylight in December / Average sunshine in December - Commodore, 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: 3h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

Average sunshine days in December
Commodore, PA

Average sunshine days in December - Commodore, PA
  • Average sunshine days in December: 9.8 days

The month with the most sunshine days is November (13.3 days).
The month with the least sunshine days is February (7.3 days).

Average UV index in December
Commodore, PA

Average UV index in December - Commodore, 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
Commodore, PA

Average cloud cover in December - Commodore, PA
  • Average cloud cover in December: 68

The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in December
Commodore, PA

Average visibility in December - Commodore, 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).

Commodore, Pennsylvania, USA

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