Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Arrival of December comes with a reduction in the average high-temperature, falling from a fresh 52.2°F (11.2°C) in November to a chilly 42.8°F (6°C). Georgetown of Philadelphia records an average temperature drop to a freezing cold 31.6°F (-0.2°C) in December.Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 78%.Rainfall
In December, in Georgetown of Philadelphia, the rain falls for 7.5 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Georgetown of Philadelphia, there are 122.4 rainfall days, and 12.68" (322mm) of precipitation is accumulated.Snowfall
Months with snowfall in Georgetown of Philadelphia are January through April, November and December. In Georgetown of Philadelphia, in December, during 2.5 snowfall days, 0.71" (18mm) of snow is typically accumulated. Throughout the year, there are 16.3 snowfall days, and 4.72" (120mm) of snow is accumulated.Daylight
December has the shortest days of the year in Georgetown of Philadelphia, Pennsylvania, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:35 pm. On the last day of December, in Georgetown of Philadelphia, sunrise is at 7:22 am and sunset at 4:45 pm EST.
Sunshine
In Georgetown of Philadelphia, Pennsylvania, the average sunshine in December is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
How cold is it in Georgetown of Philadelphia in December?
What are the most humid months in Georgetown of Philadelphia?
What is the average humidity in December in Georgetown of Philadelphia?
How many days does it rain in December in Georgetown of Philadelphia?
How many days does it snow in December in Georgetown of Philadelphia?
What is the month with the shortest days in Georgetown of Philadelphia?
What is the average length of the day in December in Georgetown of Philadelphia?
When is the sunrise / sunset in December in Georgetown of Philadelphia?
How long on average sun shines in December in Georgetown of Philadelphia?
When is the lowest UV index in Georgetown of Philadelphia?
How high is the UV index in December in Georgetown of Philadelphia?
Average temperature in December
Georgetown of Philadelphia, PA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 31.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Georgetown of Philadelphia, 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
Georgetown of Philadelphia, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Georgetown of Philadelphia, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Georgetown of Philadelphia, PA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in December
Georgetown of Philadelphia, PA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).
Average snowfall in December
Georgetown of Philadelphia, PA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Georgetown of Philadelphia, PA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (5.1 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
Georgetown of Philadelphia, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Georgetown of Philadelphia, PA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in December
Georgetown of Philadelphia, 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, March, November and December (UV index 2).
Average cloud cover in December
Georgetown of Philadelphia, PA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Georgetown of Philadelphia, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Georgetown of Philadelphia, Pennsylvania, USA
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