December weather forecast
Damascus, PA

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Weather in December

The first month of the winter, December, is still a cold month in Damascus, Pennsylvania, with an average temperature varying between 36°F (2.2°C) and 25°F (-3.9°C).

Temperature

In December, the average high-temperature goes from a frosty 45.9°F (7.7°C) in November to a wintry 36°F (2.2°C). During the month of December, Damascus experiences a steady low-temperature average of 25°F (-3.9°C).

Humidity

December is the most humid month, with an average relative humidity of 85%.

Rainfall

In Damascus, in December, it is raining for 8.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 132.5 rainfall days, and 19.21" (488mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The months with the most snowfall are January and December, with an average 3.27" (83mm) of accumulated snow.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 7:08 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:39 pm EST.

Sunshine

In Damascus, 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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 1 in December leads to these recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

Frequently asked questions

How cold is December?

In December, the average high-temperature and low-temperature are 36°F (2.2°C) and 25°F (-3.9°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 86°F (30°C).

What is the most humid month?

The most humid month is December, with an average relative humidity of 85%.

What is the average humidity in December?

In December, the average relative humidity is 85%.

How many days does it rain in December in Damascus?

In Damascus, in December, it is raining for 8.5 days, with typically 1.46" (37mm) of accumulated precipitation.

What is the snowiest month?

The months with the most snowfall are January and December, with an average 3.27" (83mm) of accumulated snow.

How many days does it snow in December?

In Damascus, in December, during 8.2 snowfall days, 3.27" (83mm) of snow is typically accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

The average day length in December is 9h and 13min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:39 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 3.8h.

When is the lowest UV index in Damascus?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Damascus, PA

Average temperature in December - Damascus, PA
  • Average high temperature in December: 36°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 (30.4°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in December
Damascus, PA

Average pressure in December - Damascus, PA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Damascus, PA

Average wind speed in December - Damascus, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Damascus, PA

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

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is July (77%).

Average rainfall in December
Damascus, PA

Average rainfall in December - Damascus, PA
  • Average rainfall in December: 1.46"

The wettest months (with the highest rainfall) are July and August (2.09").
The driest months (with the least rainfall) are January and September (1.14").

Average rainfall days in December
Damascus, PA

Average rainfall days in December - Damascus, PA
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is May (15.6 days).
The months with the least rainy days are January and February (6.9 days).

Average snowfall in December
Damascus, PA

Average snowfall in December - Damascus, PA
  • Average snowfall in December: 3.27"

The months with the highest snowfall are January and December (3.27").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Damascus, PA

Average snowfall days in December - Damascus, PA
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

Average sunshine days in December
Damascus, PA

Average sunshine days in December - Damascus, PA
  • Average sunshine days in December: 15.2 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (12.5 days).

Average UV index in December
Damascus, PA

Average UV index in December - Damascus, 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
Damascus, PA

Average cloud cover in December - Damascus, PA
  • Average cloud cover in December: 62

The months with the most cloud cover are February and December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in December
Damascus, PA

Average visibility in December - Damascus, PA
  • Average visibility in December: 5mi

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

Damascus, Pennsylvania, USA

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