Weather on December 20
Philadelphia, PA
55 Years of Data
Avg High
43°F
Avg Low
31°F
Warmest
2002
51°F avg
Coldest
2004
17°F avg
About This Date
December 20th in Philadelphia, PA typically brings chilly winter weather, with average highs around 43°F and lows near 31°F. Over 55 years of records, the warmest December 20th was in 2002 (51°F average), while the coldest was 2004 (17°F) — a 34°F range across recorded history. Precipitation has occurred on 18% of recorded December 20th dates, with snow falling 5% of the time (heaviest snowfall: 11"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 20th in Philadelphia, PA? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 28° | 44° | — | — |
| 2024 | 46° | 36° | 41° | — | — |
| 2023 | 42° | 30° | 36° | — | — |
| 2022 | 37° | 29° | 33° | — | — |
| 2021 | 48° | 30° | 39° | — | — |
| 2020 | 34° | 27° | 30° | — | — |
| 2019 | 39° | 19° | 29° | — | — |
| 2018 | 45° | 34° | 39° | — | — |
| 2017 | 58° | 45° | 51° | — | — |
| 2016 | 35° | 25° | 30° | — | — |
| 2015 | 41° | 32° | 37° | — | — |
| 2014 | 42° | 32° | 37° | — | — |
| 2013 | 46° | 33° | 40° | — | — |
| 2012 | 50° | 36° | 43° | — | — |
| 2011 | 50° | 42° | 46° | 0.23" | — |
| 2010 | 36° | 25° | 30° | — | — |
| 2009 | 26° | 21° | 24° | 2.36" | 11" |
| 2008 | 37° | 25° | 31° | — | — |
| 2007 | 45° | 33° | 39° | — | — |
| 2006 | 45° | 34° | 39° | — | — |
| 2005 | 39° | 22° | 30° | — | — |
| 2004coldest | 21° | 13° | 17° | — | — |
| 2003 | 39° | 31° | 35° | — | — |
| 2002warmest | 61° | 41° | 51° | 1.04" | — |
| 2001 | 45° | 37° | 41° | — | — |
| 2000 | 30° | 23° | 27° | — | — |
| 1999 | 53° | 37° | 45° | 1.12" | — |
| 1998 | 53° | 47° | 50° | — | — |
| 1997 | 56° | 39° | 47° | — | — |
| 1996 | 26° | 18° | 22° | 0.15" | 0.1" |
| 1995 | 24° | 21° | 23° | 2.13" | 2.8" |
| 1994 | 46° | 33° | 40° | — | — |
| 1993 | 47° | 37° | 42° | — | — |
| 1992 | 49° | 37° | 43° | — | — |
| 1991 | 40° | 23° | 31° | — | — |
| 1990 | 45° | 37° | 41° | — | — |
| 1989 | 33° | 20° | 26° | — | — |
| 1988 | 59° | 36° | 47° | — | — |
| 1987 | 54° | 35° | 44° | — | — |
| 1986 | 41° | 38° | 39° | — | — |
| 1985 | 31° | 24° | 27° | — | — |
| 1984 | 53° | 43° | 48° | — | — |
| 1983 | 32° | 19° | 26° | — | — |
| 1982 | 42° | 32° | 37° | — | — |
| 1981 | 28° | 21° | 25° | — | — |
| 1980 | 26° | 21° | 24° | — | — |
| 1979 | 34° | 24° | 29° | — | — |
| 1978 | 42° | 30° | 36° | — | — |
| 1977 | 45° | 37° | 41° | 0.28" | — |
| 1976 | 51° | 38° | 44° | 0.76" | — |
| 1975 | 41° | 24° | 33° | — | — |
| 1974 | 45° | 34° | 39° | — | — |
| 1973 | 56° | 27° | 41° | 1.63" | — |
| 1972 | 46° | 41° | 44° | 0.18" | — |
| 1971 | 49° | 42° | 45° | — | — |
55 years of data from PHILADELPHIA WSFO