December weather in Philadelphia, PA
The average temperature in Philadelphia in December is 39.9°F (33.2°F–46.5°F). Average precipitation: 4.27 inches. Average snowfall is 3.5 inches.
December is a winter month in Philadelphia, and is cooler than the annual average of 57.7°F. Daily temperatures swing about 13.3°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 10m. For travel, December is cool.
Avg High
46.5°F
Avg Low
33.2°F
Precipitation
4.27 in
Snow
3.5 in
December records in Philadelphia
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 70.0°F (2001) | 23.0°F (1999) | 2.25 in (2016) |
| December 2 | 66.0°F (2010) | 24.1°F (2007) | 1.80 in (2019) |
| December 3 | 66.9°F (1998) | 23.0°F (2000) | 1.08 in (2009) |
| December 4 | 72.0°F (1998) | 21.0°F (2002) | 0.29 in (2003) |
| December 5 | 70.0°F (1999) | 24.1°F (2025) | 1.90 in (1993) |
| December 6 | 72.0°F (2001) | 19.0°F (2007) | 1.30 in (2018) |
| December 7 | 73.0°F (1998) | 19.9°F (2008) | 2.01 in (2011) |
| December 8 | 62.1°F (1994) | 21.9°F (2006) | 1.30 in (1996) |
| December 9 | 63.0°F (2008) | 19.0°F (2025) | 2.11 in (2009) |
| December 10 | 64.9°F (2008) | 12.9°F (1995) | 1.97 in (2003) |
| December 11 | 64.0°F (2024) | 15.1°F (1995) | 1.90 in (2008) |
| December 12 | 66.0°F (2021) | 18.0°F (1995) | 0.65 in (2010) |
| December 13 | 70.0°F (2015) | 16.0°F (2005) | 1.02 in (2000) |
| December 14 | 72.0°F (2015) | 18.0°F (2010) | 3.29 in (1996) |
| December 15 | 69.1°F (2015) | 19.0°F (2005) | 1.21 in (2005) |
| December 16 | 62.1°F (2015) | 18.0°F (2016) | 2.13 in (2022) |
| December 17 | 64.9°F (2000) | 15.1°F (2016) | 1.18 in (2019) |
| December 18 | 66.9°F (2006) | 21.9°F (2009) | 1.02 in (2015) |
| December 19 | 60.1°F (2016) | 18.0°F (2019) | 0.35 in (2008) |
| December 20 | 61.0°F (2002) | 12.9°F (2004) | 0.93 in (2009) |
| December 21 | 64.9°F (2018) | 15.1°F (2008) | 1.84 in (2012) |
| December 22 | 66.9°F (2013) | 14.0°F (2000) | 1.53 in (2011) |
| December 23 | 68.0°F (2013) | 12.0°F (2024) | 0.96 in (2022) |
| December 24 | 69.1°F (2015) | 6.1°F (2022) | 2.00 in (2003) |
| December 25 | 70.0°F (2015) | 7.0°F (2022) | 0.97 in (2014) |
| December 26 | 69.1°F (2015) | 16.0°F (1993) | 0.93 in (2009) |
| December 27 | 62.1°F (2008) | 15.1°F (1993) | 1.50 in (2015) |
| December 28 | 66.0°F (2008) | 12.9°F (2017) | 1.04 in (2018) |
| December 29 | 60.1°F (2018) | 14.0°F (2017) | 1.14 in (2015) |
| December 30 | 64.9°F (2024) | 14.0°F (2017) | 1.20 in (2013) |
| December 31 | 60.1°F (2022) | 14.0°F (2017) | 0.29 in (2015) |