United StatesAverage weather for Philadelphia in December
It's cold in December in Philadelphia with an average temperature of 9°C. Temperatures this month range from a low of 5°C to a high of 12°C. At night, you can expect temperatures between -2°C and 5°C.
Start of December
The month of December starts in Philadelphia with cold temps, averaging around 10°C during the day and nights around 3°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid December
By mid-December, daytime temps drop to around 9°C, with nights around 2°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of December
By the end of December, the average daytime temperature in Philadelphia is around 10°C, while nighttime temps are about 2°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In December, there is an average of 102 mm of precipitation, spread over 10 days. Of the total precipitation, about 2,8 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
Philadelphia in December |
New York | ||
|---|---|---|---|
 Average temperature |
9°C | 9°C | |
 Max. temperature |
12°C | 12°C | |
| Min. temperature |
5°C | -5°C | |
 Total precipitation |
102 mm | 133 mm | |
| Rainy days |
10 days | 17 days | |
 Total snowfall |
2,8 cm | 9,7 cm | |
| Snowy days |
2 days | 3 days | |
November
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is December a good time to visit Philadelphia?
Looking for sun? December isn’t a good month to be in Philadelphia. There’s too much chance of rain this month.
Temperature records
With 22°C in 2015, Philadelphia reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -9°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -14°C to a highest value of 18°C.
Check out the climate of Philadelphia for all months and discover the best travel time
Daily Temperature in December in Philadelphia
This chart shows the average daily high and low temperatures in December for Philadelphia, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Philadelphia
The chart below shows the average daily precipitation in December for Philadelphia, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 10 days of precipitation in Philadelphia.
Daily Snowfall in December in Philadelphia
This chart shows the average daily snowfall in December in Philadelphia, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV index in December in Philadelphia
This chart shows the average daily UV index in December in Philadelphia, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in Philadelphia over the years
This chart shows the average temperature in December in Philadelphia, measured in degrees Celsius, over the past few years.
Total precipitation in December in Philadelphia over the years
This chart shows the average precipitation in December in Philadelphia, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in December in Philadelphia per year
This chart shows the average snowfall in December in Philadelphia, measured in centimeters, over the past few years.
Daily weather in December for Philadelphia
Click on any day in December to get detailed info about the usual weather on that day in Philadelphia. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Philadelphia
Have you been to Philadelphia in December?
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Average weather in Philadelphia by month
Click on a month below to see detailed weather info for Philadelphia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Philadelphia for all months at once
