December weather forecast
South Hills, PA

Share

Weather in December

December, the first month of the winter in South Hills, is also an icy month, with an average temperature fluctuating between 28.2°F (-2.1°C) and 39.7°F (4.3°C).

Temperature

South Hills's progression into December includes a drop in the average high-temperature, from a frosty 49.3°F (9.6°C) in November to a wintry 39.7°F (4.3°C). In December, South Hills records an average nighttime temperature of 28.2°F (-2.1°C).

Humidity

In South Hills, the average relative humidity in December is 83%.

Rainfall

In South Hills, during December, the rain falls for 10.7 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 164 rainfall days, and 26.89" (683mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in South Hills. In South Hills, during December, snow falls for 11.8 days and regularly aggregates up to 2.64" (67mm) of snow. In South Hills, during the entire year, snow falls for 53.3 days and aggregates up to 13.27" (337mm) 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 December, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:03 pm EST.

Sunshine

In December, the average sunshine in South Hills is 3.3h.

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 minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 1 transforms into these recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.

Frequently asked questions

Is December cold?

South Hills in December has an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 28.2°F (-2.1°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

How many days does it rain in December?

In South Hills, during December, the rain falls for 10.7 days and regularly aggregates up to 2.09" (53mm) of precipitation.

How much does it snow in December?

In South Hills, in December, during 11.8 snowfall days, 2.64" (67mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does South Hills have in December?

In South Hills, the average day length in December is 9h and 21min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:03 pm EST.

How many hours of sunshine does South Hills have in December?

In December, the average sunshine duration is 3.3h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes 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
South Hills, PA

Average temperature in December - South Hills, PA
  • Average high temperature in December: 39.7°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.2°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

Average pressure in December
South Hills, PA

Average pressure in December - South Hills, PA
  • Average pressure in December: 30.11"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
South Hills, PA

Average wind speed in December - South Hills, PA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
South Hills, PA

Average humidity in December - South Hills, PA
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (73%).

Average rainfall in December
South Hills, PA

Average rainfall in December - South Hills, PA
  • Average rainfall in December: 2.09"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.61").

Average rainfall days in December
South Hills, PA

Average rainfall days in December - South Hills, PA
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).

Average snowfall in December
South Hills, PA

Average snowfall in December - South Hills, PA
  • Average snowfall in December: 2.64"

The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
South Hills, PA

Average snowfall days in December - South Hills, PA
  • Average snowfall days in December: 11.8 days

The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
South Hills, PA

Average daylight in December / Average sunshine in December - South Hills, 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 2min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in December
South Hills, PA

Average sunshine days in December - South Hills, PA
  • Average sunshine days in December: 11 days

The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (9.5 days).

Average UV index in December
South Hills, PA

Average UV index in December - South Hills, PA
  • Average UV index in December: 1

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

Average cloud cover in December
South Hills, PA

Average cloud cover in December - South Hills, PA
  • Average cloud cover in December: 66

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December
South Hills, PA

Average visibility in December - South Hills, PA
  • Average visibility in December: 5mi

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

South Hills, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location