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
With the onset of December, Philadelphia experiences a modest temperature adjustment, with the average high-temperature gently receding from a frosty 8.4°C (47.1°F) in November to a wintry 4.1°C (39.4°F). Philadelphia's December nights witness minimal differential from the daytime temperatures, with averages of 0°C (32°F).Humidity
In Philadelphia, the average relative humidity in December is 88%.Rainfall
In Philadelphia, in December, during 12.2 rainfall days, 24mm (0.94") of precipitation is typically accumulated. In Philadelphia, during the entire year, the rain falls for 142 days and collects up to 267mm (10.51") of precipitation.Snowfall
Months with snowfall in Philadelphia are January through April, November and December. In December, in Philadelphia, it is snowing for 5.2 days. Throughout December, 30mm (1.18") of snow is accumulated. Throughout the year, in Philadelphia, there are 26.3 snowfall days, and 113mm (4.45") of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 7h and 48min of daylight.On the first day of December, sunrise is at 07:51 and sunset at 15:55. On the last day of the month, sunrise is at 08:13 and sunset at 16:01 CET.
Sunshine
In Philadelphia, the average sunshine in December is 3.4h.UV index
In Philadelphia, the average daily maximum UV index in December is 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: The maximum UV index, 2 during December, leads to the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is it in Philadelphia in December?
What is the average humidity in December in Philadelphia?
How much does it rain in Philadelphia in December?
How much does it snow in Philadelphia in December?
What is the month with the shortest days in Philadelphia?
How many hours of daylight does Philadelphia have in December?
When is the sunrise / sunset in December in Philadelphia?
How many hours of sunshine does Philadelphia have in December?
What is the UV index intensity in December in Philadelphia?
Average temperature in December
Philadelphia, Germany
- Average high temperature in December: 4.1°C
The warmest month (with the highest average high temperature) is August (25.3°C).
The month with the lowest average high temperature is January (2.3°C).
- Average low temperature in December: 0°C
The month with the highest average low temperature is August (15.2°C).
The coldest month (with the lowest average low temperature) is January (-2°C).
Average pressure in December
Philadelphia, Germany
- Average pressure in December: 1016mbar
The month with the highest atmospheric pressure is October (1017.4mbar).
The month with the lowest atmospheric pressure is November (1014.3mbar).
Average wind speed in December
Philadelphia, Germany
- Average wind speed in December: 14.5km/h
The windiest month (with the highest average wind speed) is December (14.5km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).
Average humidity in December
Philadelphia, Germany
- Average humidity in December: 88%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Philadelphia, Germany
- Average rainfall in December: 24mm
The wettest month (with the highest rainfall) is July (39mm).
The driest month (with the least rainfall) is April (11mm).
Average rainfall days in December
Philadelphia, Germany
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in December
Philadelphia, Germany
- Average snowfall in December: 30mm
The month with the highest snowfall is January (37mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Philadelphia, Germany
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (9 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
Philadelphia, Germany
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Philadelphia, Germany
- Average sunshine days in December: 12.4 days
The months with the most sunshine days are September and October (16.9 days).
The month with the least sunshine days is December (12.4 days).
Average UV index in December
Philadelphia, Germany
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Philadelphia, Germany
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Philadelphia, Germany
- Average visibility in December: 8km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, November and December (8km).
Philadelphia, Germany
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