December weather forecast
Sandy, PA

Weather in December

The first month of the winter, December, is still a cold month in Sandy, Pennsylvania, with an average temperature varying between 25.5°F (-3.6°C) and 36.1°F (2.3°C).

Temperature

In December, the average high-temperature drops from a frosty 45.7°F (7.6°C) in November to a wintry 36.1°F (2.3°C). The average low-temperature, in Sandy, is 25.5°F (-3.6°C).

Humidity

In Sandy, the average relative humidity in December is 86%.

Rainfall

In December, in Sandy, the rain falls for 12.6 days. Throughout December, 2.95" (75mm) of precipitation is accumulated. In Sandy, Pennsylvania, during the entire year, the rain falls for 177 days and collects up to 34.29" (871mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Sandy, in December, snow falls for 16.5 days, with typically accumulated 7.44" (189mm) of snow. In Sandy, during the entire year, snow falls for 79.7 days and aggregates up to 36.38" (924mm) of snow.

Daylight

With an average of 9h and 16min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:40 am and sunset at 4:56 pm EST.

Sunshine

In December, the average sunshine is 2.8h.

UV index

December is the month with the lowest UV index in Sandy, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Sandy?

The average high-temperature, in December, in Sandy, Pennsylvania, is 36.1°F (2.3°C), while the average low-temperature is 25.5°F (-3.6°C).

What is the average humidity in December in Sandy?

In Sandy, Pennsylvania, the average relative humidity in December is 86%.

How much does it rain in Sandy in December?

In Sandy, in December, during 12.6 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

How many days does it snow in December in Sandy?

In Sandy, in December, during 16.5 snowfall days, 7.44" (189mm) of snow is typically accumulated.

What is the month with the shortest days in Sandy?

The month with the shortest days in Sandy is December, with an average of 9h and 16min of daylight.

What is the average length of the day in December in Sandy?

In December, the average day length in Sandy is 9h and 16min.

When are sunrise and sunset in December in Sandy?

On the first day of December in Sandy, sunrise is at 7:21 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:56 pm EST.

How many hours of sunshine does Sandy have in December?

The average sunshine duration in December in Sandy, Pennsylvania, is 2.8h.

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

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

How high is the UV index in December in Sandy?

The average daily maximum UV index in December in Sandy, Pennsylvania, is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Sandy, PA

Average temperature in December - Sandy, PA
  • Average high temperature in December: 36.1°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in December
Sandy, PA

Average pressure in December - Sandy, 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).

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Average wind speed in December
Sandy, PA

Average wind speed in December - Sandy, PA
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in December
Sandy, PA

Average humidity in December - Sandy, PA
  • Average humidity in December: 86%

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

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Average rainfall in December
Sandy, PA

Average rainfall in December - Sandy, PA
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is April (3.7").
The driest month (with the least rainfall) is November (2.17").

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Average rainfall days in December
Sandy, PA

Average rainfall days in December - Sandy, PA
  • Average rainfall days in December: 12.6 days

The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is January (8.9 days).

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Average snowfall in December
Sandy, PA

Average snowfall in December - Sandy, PA
  • Average snowfall in December: 7.44"

The month with the highest snowfall is January (9.25").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Sandy, PA

Average snowfall days in December - Sandy, PA
  • Average snowfall days in December: 16.5 days

The month with the highest number of snowfall days is January (20.2 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
Sandy, PA

Average daylight in December / Average sunshine in December - Sandy, PA
  • Average daylight in December: 9h and 16min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 16min).

  • Average sunshine in December: 2h and 48min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in December
Sandy, PA

Average sunshine days in December - Sandy, PA
  • Average sunshine days in December: 7.9 days

The month with the most sunshine days is September (13.3 days).
The month with the least sunshine days is February (6.3 days).

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Average UV index in December
Sandy, PA

Average UV index in December - Sandy, 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
Sandy, PA

Average cloud cover in December - Sandy, PA
  • Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).

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Average visibility in December
Sandy, PA

Average visibility in December - Sandy, PA
  • Average visibility in December: 4mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February and December (4mi).

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