Weather on December 18
Philadelphia, PA
55 Years of Data
Avg High
44°F
Avg Low
32°F
Warmest
2006
57°F avg
Coldest
1989
21°F avg
About This Date
December 18th in Philadelphia, PA typically brings chilly winter weather, with average highs around 44°F and lows near 32°F. Over 55 years of records, the warmest December 18th was in 2006 (57°F average), while the coldest was 1989 (21°F) — a 36°F range across recorded history. Precipitation has occurred on 16% of recorded December 18th dates, with snow falling 2% of the time. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Philadelphia, PA? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 46° | 34° | 40° | — | — |
| 2024 | 60° | 39° | 50° | — | — |
| 2023 | 62° | 50° | 56° | — | — |
| 2022 | 44° | 36° | 40° | — | — |
| 2021 | 60° | 50° | 55° | — | — |
| 2020 | 36° | 24° | 30° | — | — |
| 2019 | 38° | 32° | 35° | 0.43" | — |
| 2018 | 48° | 36° | 42° | — | — |
| 2017 | 43° | 33° | 38° | — | — |
| 2016 | 40° | 25° | 32° | 1.68" | — |
| 2015 | 56° | 48° | 52° | 2.59" | — |
| 2014 | 53° | 34° | 43° | — | — |
| 2013 | 34° | 24° | 29° | — | 0.3" |
| 2012 | 51° | 43° | 47° | 0.97" | — |
| 2011 | 36° | 26° | 31° | — | — |
| 2010 | 36° | 26° | 31° | — | — |
| 2009 | 35° | 22° | 28° | — | — |
| 2008 | 43° | 34° | 38° | 2.16" | — |
| 2007 | 36° | 30° | 33° | — | — |
| 2006warmest | 67° | 47° | 57° | — | — |
| 2005 | 48° | 32° | 40° | — | — |
| 2004 | 47° | 31° | 39° | — | — |
| 2003 | 36° | 31° | 33° | — | — |
| 2002 | 40° | 25° | 32° | — | — |
| 2001 | 58° | 44° | 51° | 0.05" | — |
| 2000 | 35° | 27° | 31° | — | — |
| 1999 | 47° | 38° | 42° | — | — |
| 1998 | 44° | 33° | 39° | — | — |
| 1997 | 48° | 35° | 42° | — | — |
| 1996 | 50° | 42° | 46° | 0.23" | — |
| 1995 | 37° | 29° | 33° | — | — |
| 1994 | 47° | 40° | 43° | 0.13" | — |
| 1993 | 44° | 32° | 38° | — | — |
| 1992 | 49° | 37° | 43° | — | — |
| 1991 | 40° | 20° | 30° | — | — |
| 1990 | 66° | 38° | 52° | — | — |
| 1989coldest | 29° | 14° | 21° | — | — |
| 1988 | 35° | 21° | 28° | — | — |
| 1987 | 41° | 29° | 35° | — | — |
| 1986 | 52° | 41° | 46° | — | — |
| 1985 | 40° | 19° | 29° | — | — |
| 1984 | 64° | 47° | 55° | — | — |
| 1983 | 38° | 31° | 34° | — | — |
| 1982 | 35° | 24° | 30° | — | — |
| 1981 | 39° | 27° | 33° | — | — |
| 1980 | 43° | 26° | 34° | — | — |
| 1979 | 33° | 23° | 28° | — | — |
| 1978 | 45° | 36° | 40° | — | — |
| 1977 | 42° | 34° | 38° | 4.83" | — |
| 1976 | 46° | 37° | 42° | — | — |
| 1975 | 46° | 22° | 34° | — | — |
| 1974 | 39° | 32° | 36° | — | — |
| 1973 | 26° | 19° | 23° | — | — |
| 1972 | 40° | 23° | 31° | — | — |
| 1971 | 42° | 28° | 35° | — | — |
55 years of data from PHILADELPHIA CITY