Weather in Philadelphia in December 2024
Average weather
Average temperature in Philadelphia in December
The expected average maximum temperature in December is +10°C with a maximum of +16°C and a minimum of -1°C.
The average maximum temperature goes down 12% by the end of the month, compared with the beginning of the month, from +9°C to +7°C.
Is Philadelphia warm or cold in December?
Philadelphia is typically cool in December.
Maximum temperatures go down compared to the previous month from +13°C to +8°C. The minimum temperature also goes down from +5°C to 0°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Philadelphia, here is the comparison with other months:
Climate in Philadelphia in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +13°C | +8°C | +5°C | ||||
| Min. temperature | ||||||
| -8°C | -17°C | -24°C | ||||
| Max. temperature | ||||||
| +26°C | +23°C | +23°C | ||||
| Rainfall | ||||||
| 76 mm | 81 mm | 57 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 68% | 69% | 67% | ||||
| Air pressure | ||||||
| 1018 HPa | 1018 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 6 | 4 | 4 | ||||
| Cloudy days | ||||||
| 14 | 14 | 14 | ||||
| Rainy days | ||||||
| 10 | 9 | 7 | ||||
| Snowy days | ||||||
| 0 | 3 | 6 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +13°C in the day, the average maximum temperature lowers to +8°C. Prepare for more rain. Average rainfall goes from 76 mm to 81 mm. Humidity rises from 68% to 69%. The average wind speed doesn’t change much during December, staying around 3 m/s. The days becoming less sunny, going from 6 sunny days in November to 4 in December.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Philadelphia is gradually increasing during December, going from 2 m/s to 3 m/s over the course of the month.
Rain
Snow
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Philadelphia?
Climate Change over Years
The climate in Philadelphia in December has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+17°C) and the highest in 2012 (+20°C). The driest year was 2001 with only 685 mm of rainfall, and the wettest year was 2023 with 1758 mm.
FAQ
Is December a good time to visit Philadelphia?
Can you sunbathe in Philadelphia in December?
Is Philadelphia rainy in December?
Is it sunny in Philadelphia in December?
Other cities in USA
Monthly weather in Philadelphia
Source of the data
For this page, we’ve looked at the typical weather in Philadelphia, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.