Weather on December 20
Philadelphia, PA
55 Years of Data
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° | — | — |
Philadelphia, PA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Philadelphia, PA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Philadelphia, PA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Philadelphia, PA
Philadelphia, PA has no months that meet our "pleasant" threshold — every season has tradeoffs.