Weather on December 17
Philadelphia, PA
55 Years of Data
Avg High
45°F
Avg Low
33°F
Warmest
2021
57°F avg
Coldest
1989
23°F avg
About This Date
December 17th in Philadelphia, PA typically brings chilly winter weather, with average highs around 45°F and lows near 33°F. Over 55 years of records, the warmest December 17th was in 2021 (57°F average), while the coldest was 1989 (23°F) — a 34°F range across recorded history. Precipitation has occurred on 27% of recorded December 17th dates, with snow falling 7% of the time. The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.
Planning for December 17th in Philadelphia, PA? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 35° | 29° | 32° | — | — |
| 2024 | 52° | 43° | 47° | — | — |
| 2023 | 56° | 44° | 50° | — | — |
| 2022 | 45° | 37° | 41° | — | — |
| 2021warmest | 64° | 50° | 57° | — | — |
| 2020 | 33° | 27° | 30° | — | — |
| 2019 | 39° | 31° | 35° | 3" | — |
| 2018 | 45° | 38° | 41° | 0.23" | — |
| 2017 | 41° | 24° | 33° | — | — |
| 2016 | 31° | 15° | 23° | 1.4" | 0.4" |
| 2015 | 52° | 49° | 50° | — | — |
| 2014 | 52° | 37° | 44° | — | — |
| 2013 | 32° | 24° | 28° | — | 0.1" |
| 2012 | 51° | 43° | 47° | 0.23" | — |
| 2011 | 43° | 29° | 36° | — | — |
| 2010 | 27° | 21° | 24° | 0.05" | 0.2" |
| 2009 | 39° | 26° | 33° | — | — |
| 2008 | 41° | 35° | 38° | 0.15" | — |
| 2007 | 42° | 32° | 37° | 0.23" | — |
| 2006 | 55° | 40° | 47° | — | — |
| 2005 | 45° | 32° | 38° | — | — |
| 2004 | 46° | 36° | 41° | — | — |
| 2003 | 50° | 31° | 40° | 0.33" | — |
| 2002 | 38° | 26° | 32° | — | — |
| 2001 | 52° | 42° | 47° | 1.17" | — |
| 2000 | 65° | 32° | 48° | 1.22" | — |
| 1999 | 46° | 35° | 41° | — | — |
| 1998 | 45° | 36° | 40° | 0.03" | — |
| 1997 | 60° | 35° | 48° | — | — |
| 1996 | 53° | 44° | 49° | 0.05" | — |
| 1995 | 41° | 30° | 36° | 0.05" | — |
| 1994 | 41° | 32° | 37° | 0.33" | — |
| 1993 | 44° | 30° | 37° | — | — |
| 1992 | 59° | 44° | 52° | — | — |
| 1991 | 44° | 26° | 35° | — | — |
| 1990 | 49° | 37° | 43° | — | — |
| 1989coldest | 30° | 15° | 23° | — | — |
| 1988 | 33° | 24° | 29° | — | — |
| 1987 | 42° | 33° | 38° | — | — |
| 1986 | 51° | 42° | 47° | — | — |
| 1985 | 42° | 33° | 38° | — | — |
| 1984 | 60° | 49° | 54° | — | — |
| 1983 | 41° | 32° | 37° | — | — |
| 1982 | 44° | 29° | 36° | — | — |
| 1981 | 38° | 28° | 33° | — | — |
| 1980 | 35° | 26° | 31° | — | — |
| 1979 | 47° | 22° | 34° | — | — |
| 1978 | 44° | 36° | 40° | — | — |
| 1977 | 44° | 36° | 40° | — | — |
| 1976 | 42° | 37° | 40° | — | — |
| 1975 | 50° | 32° | 41° | — | — |
| 1974 | 46° | 39° | 43° | — | — |
| 1973 | 30° | 19° | 25° | 0.51" | 0.5" |
| 1972 | 28° | 24° | 26° | — | — |
| 1971 | 55° | 42° | 49° | — | — |
55 years of data from PHILADELPHIA WSFO