December weather forecast
Sandyville, PA

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Weather in December

December, the first month of the winter in Sandyville, is also a wintry month, with an average temperature fluctuating between 27.3°F (-2.6°C) and 38.5°F (3.6°C).

Temperature

Start of December brings a shift in the average high-temperature, falling from November's frosty 48.2°F (9°C) to an icy 38.5°F (3.6°C). During December, Sandyville observes a consistent average nighttime temperature of 27.3°F (-2.6°C).

Humidity

February and December, with an average relative humidity of 82%, are the most humid months.

Rainfall

In December, the rain falls for 5.6 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. In Sandyville, during the entire year, the rain falls for 89.8 days and collects up to 8.07" (205mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 3.4 days. Throughout December, 0.71" (18mm) of snow is accumulated. In Sandyville, during the entire year, snow falls for 22.7 days and aggregates up to 3.54" (90mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:41 pm EST.

Sunshine

In Sandyville, the average sunshine in December is 4.6h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

Sandyville in December has an average high-temperature of 38.5°F (3.6°C) and an average low-temperature of 27.3°F (-2.6°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in July is evaluated at 89.6°F (32°C).

What is the most humid month?

February and December, with an average relative humidity of 82%, are most humid months.

What is the average humidity in December?

The average relative humidity in December is 82%.

How many days does it rain in December?

In December, in Sandyville, the rain falls for 5.6 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

How many days does it snow in December?

In Sandyville, in December, snow falls for 3.4 days, with typically accumulated 0.71" (18mm) of snow.

What is the month with the shortest days in Sandyville?

December has the shortest days of the year in Sandyville, with an average of 9h and 18min of daylight.

How many hours of daylight does Sandyville have in December?

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

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:41 pm EST.

How long on average sun shines in December?

In Sandyville, the average sunshine duration in December is 4.6h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a low health risk 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
Sandyville, PA

Average temperature in December - Sandyville, PA
  • Average high temperature in December: 38.5°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
Sandyville, PA

Average pressure in December - Sandyville, 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
Sandyville, PA

Average wind speed in December - Sandyville, PA
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Sandyville, PA

Average humidity in December - Sandyville, PA
  • Average humidity in December: 82%

The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Sandyville, PA

Average rainfall in December - Sandyville, PA
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.24").

Average rainfall days in December
Sandyville, PA

Average rainfall days in December - Sandyville, PA
  • Average rainfall days in December: 5.6 days

The months with the highest number of rainy days are April and May (10.5 days).
The month with the least rainy days is February (4.5 days).

Average snowfall in December
Sandyville, PA

Average snowfall in December - Sandyville, PA
  • Average snowfall in December: 0.71"

The months with the highest snowfall are January and February (0.91").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Sandyville, PA

Average snowfall days in December - Sandyville, PA
  • Average snowfall days in December: 3.4 days

The month with the highest number of snowfall days is February (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Sandyville, PA
  • Average daylight in December: 9h and 2min

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 18min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in December
Sandyville, PA

Average sunshine days in December - Sandyville, PA
  • Average sunshine days in December: 23.1 days

The month with the most sunshine days is September (23.2 days).
The month with the least sunshine days is April (18 days).

Average UV index in December
Sandyville, PA

Average UV index in December - Sandyville, PA
  • Average UV index in December: 1

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Sandyville, PA

Average cloud cover in December - Sandyville, PA
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in December
Sandyville, PA

Average visibility in December - Sandyville, 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).

Sandyville, Pennsylvania, USA

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