Weather on December 15
Philadelphia, PA
55 Years of Data
Avg High
47°F
Avg Low
34°F
Warmest
2015
63°F avg
Coldest
2010
23°F avg
About This Date
December 15th in Philadelphia, PA typically brings chilly winter weather, with average highs around 47°F and lows near 34°F. Over 55 years of records, the warmest December 15th was in 2015 (63°F average), while the coldest was 2010 (23°F) — a 40°F range across recorded history. Precipitation has occurred on 29% of recorded December 15th dates, with snow falling 4% of the time (heaviest snowfall: 1.6"). The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Philadelphia, PA? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 33° | 19° | 26° | — | — |
| 2024 | 37° | 27° | 32° | — | — |
| 2023 | 44° | 34° | 39° | — | — |
| 2022 | 42° | 33° | 38° | 0.13" | — |
| 2021 | 55° | 42° | 49° | — | — |
| 2020 | 40° | 32° | 36° | — | — |
| 2019 | 56° | 42° | 49° | 0.08" | — |
| 2018 | 53° | 37° | 45° | 0.46" | — |
| 2017 | 35° | 25° | 30° | — | — |
| 2016 | 44° | 23° | 34° | 0.05" | 0.3" |
| 2015warmest | 69° | 57° | 63° | 0.53" | — |
| 2014 | 47° | 39° | 43° | — | — |
| 2013 | 34° | 29° | 31° | 1.91" | 1.6" |
| 2012 | 52° | 38° | 45° | — | — |
| 2011 | 59° | 48° | 54° | 0.08" | — |
| 2010coldest | 26° | 20° | 23° | — | — |
| 2009 | 49° | 43° | 46° | 0.03" | — |
| 2008 | 66° | 40° | 53° | 1.93" | — |
| 2007 | 44° | 32° | 38° | — | — |
| 2006 | 51° | 43° | 47° | — | — |
| 2005 | 45° | 19° | 32° | 3.07" | — |
| 2004 | 37° | 25° | 31° | — | — |
| 2003 | 44° | 34° | 39° | — | — |
| 2002 | 49° | 42° | 45° | — | — |
| 2001 | 63° | 38° | 50° | — | — |
| 2000 | 41° | 34° | 37° | 0.05" | — |
| 1999 | 49° | 41° | 45° | 0.03" | — |
| 1998 | 51° | 33° | 42° | — | — |
| 1997 | 43° | 29° | 36° | — | — |
| 1996 | 45° | 39° | 42° | 1.02" | — |
| 1995 | 46° | 32° | 39° | 0.25" | — |
| 1994 | 43° | 30° | 36° | — | — |
| 1993 | 50° | 43° | 46° | — | — |
| 1992 | 38° | 31° | 34° | — | — |
| 1991 | 40° | 33° | 36° | — | — |
| 1990 | 43° | 31° | 37° | — | — |
| 1989 | 43° | 22° | 32° | — | — |
| 1988 | 51° | 29° | 40° | — | — |
| 1987 | 55° | 34° | 44° | — | — |
| 1986 | 50° | 34° | 42° | — | — |
| 1985 | 39° | 21° | 30° | — | — |
| 1984 | 52° | 41° | 46° | — | — |
| 1983 | 58° | 48° | 53° | — | — |
| 1982 | 49° | 30° | 39° | — | — |
| 1981 | 42° | 33° | 38° | — | — |
| 1980 | 33° | 23° | 28° | — | — |
| 1979 | 42° | 32° | 37° | — | — |
| 1978 | 49° | 31° | 40° | — | — |
| 1977 | 56° | 41° | 48° | — | — |
| 1976 | 50° | 34° | 42° | — | — |
| 1975 | 63° | 46° | 54° | 0.08" | — |
| 1974 | 41° | 34° | 37° | — | — |
| 1973 | 37° | 32° | 35° | — | — |
| 1972 | 44° | 35° | 40° | 2.36" | — |
| 1971 | 67° | 42° | 54° | — | — |
55 years of data from PHILADELPHIA CITY