December weather forecast
Broomall, PA

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Weather in December

The first month of the winter, December, is still a chilly month in Broomall, Pennsylvania, with an average temperature varying between 43.2°F (6.2°C) and 32°F (0°C).

Temperature

The commencement of December includes a gentle temperature shift, with the average high-temperature dropping a bit from a cool 52°F (11.1°C) in November to a frosty 43.2°F (6.2°C). December generally records an average low-temperature of 32°F (0°C).

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Broomall, during December, the rain falls for 6.5 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Broomall, during the entire year, the rain falls for 111.8 days and collects up to 9.69" (246mm) of precipitation.

Snowfall

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

Daylight

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

Sunshine

In December, the average sunshine 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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

In Broomall, in December, the average high-temperature is 43.2°F (6.2°C), and the average low-temperature is 32°F (0°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in August is appraised at 89.6°F (32°C).

What is the average humidity in December in Broomall?

In December, the average relative humidity is 77%.

How many days does it rain in December?

In Broomall, in December, it is raining for 6.5 days, with typically 0.91" (23mm) of accumulated precipitation.

How many days does it snow in December in Broomall?

In December, it is snowing for 2.1 days. Throughout December, 0.63" (16mm) of snow is accumulated.

What is the month with the shortest days in Broomall?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

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

The average day length in December is 9h and 23min.

When are sunrise and sunset in December in Broomall?

In December, on the first day of the month, 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 Broomall have in December?

In Broomall, the average sunshine duration in December is 4.9h.

What is the month 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 intensity in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's 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
Broomall, PA

Average temperature in December - Broomall, 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
Broomall, PA

Average pressure in December - Broomall, 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
Broomall, PA

Average wind speed in December - Broomall, 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
Broomall, PA

Average humidity in December - Broomall, 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
Broomall, PA

Average rainfall in December - Broomall, 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
Broomall, PA

Average rainfall days in December - Broomall, 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
Broomall, PA

Average snowfall in December - Broomall, 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
Broomall, PA

Average snowfall days in December - Broomall, 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
Broomall, PA

Average daylight in December / Average sunshine in December - Broomall, 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
Broomall, PA

Average sunshine days in December - Broomall, 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
Broomall, PA

Average UV index in December - Broomall, 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
Broomall, PA

Average cloud cover in December - Broomall, 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
Broomall, PA

Average visibility in December - Broomall, 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).

Broomall, Pennsylvania, USA

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