December weather forecast
Wynnewood, PA

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Weather in December

December, the first month of the winter in Wynnewood, is also a frosty month, with an average temperature ranging between min 32°F (0°C) and max 43.2°F (6.2°C).

Temperature

A mild shift in the average high-temperature occurs in December, reducing from a fresh 52°F (11.1°C) in November to a frosty 43.2°F (6.2°C). An average low-temperature of 32°F (0°C) marks the month of December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Wynnewood, in December, it is raining for 6.5 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, there are 111.8 rainfall days, and 9.69" (246mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Wynnewood, in December, snow falls for 2.1 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, in Wynnewood, there are 15.1 snowfall days, and 3.66" (93mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December in Wynnewood, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:46 pm EST.

Sunshine

In Wynnewood, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 2 in December suggests the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. When the Sun is at its strongest around midday, find shade and limit exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.

Frequently asked questions

Is December cold?

Wynnewood in December has an average high-temperature of 43.2°F (6.2°C) and an average low-temperature of 32°F (0°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is estimated at 89.6°F (32°C).

What is the average humidity in December?

The average relative humidity in December is 77%.

How much does it rain in December?

In Wynnewood, in December, during 6.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

How much does it snow in December?

In Wynnewood, in December, during 2.1 snowfall days, 0.63" (16mm) 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 24min of daylight.

What is the average length of the day in December?

In Wynnewood, Pennsylvania, the average day length in December is 9h and 23min.

What time are sunrise and sunset in December?

On the first day of December in Wynnewood, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:46 pm EST.

How many hours of sunshine does Wynnewood have in December?

In December, the average sunshine duration is 4.9h.

What are the months with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Wynnewood?

In Wynnewood, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents 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
Wynnewood, PA

Average temperature in December - Wynnewood, PA
  • Average high temperature in December: 43.2°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 32°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in December
Wynnewood, PA

Average pressure in December - Wynnewood, 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
Wynnewood, PA

Average wind speed in December - Wynnewood, PA
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in December
Wynnewood, PA

Average humidity in December - Wynnewood, PA
  • Average humidity in December: 77%

The months with the highest relative humidity are February and October (78%).
The months with the lowest relative humidity are April, July and August (71%).

Average rainfall in December
Wynnewood, PA

Average rainfall in December - Wynnewood, PA
  • Average rainfall in December: 0.91"

The wettest months (with the highest rainfall) are July and August (1.14").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in December
Wynnewood, PA

Average rainfall days in December - Wynnewood, PA
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (5.3 days).

Average snowfall in December
Wynnewood, PA

Average snowfall in December - Wynnewood, PA
  • Average snowfall in December: 0.63"

The months with the highest snowfall are February and March (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Wynnewood, PA

Average snowfall days in December - Wynnewood, PA
  • Average snowfall days in December: 2.1 days

The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Wynnewood, 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 24min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
Wynnewood, PA

Average sunshine days in December - Wynnewood, PA
  • Average sunshine days in December: 22.2 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (14.9 days).

Average UV index in December
Wynnewood, PA

Average UV index in December - Wynnewood, PA
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Wynnewood, PA

Average cloud cover in December - Wynnewood, PA
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Wynnewood, PA

Average visibility in December - Wynnewood, PA
  • Average visibility in December: 6mi

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

Wynnewood, Pennsylvania, USA

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