Weather on August 20
Philadelphia, PA
55 Years of Data
Avg High
84°F
Avg Low
68°F
Warmest
1983
87°F avg
Coldest
1990
62°F avg
About This Date
August 20th in Philadelphia, PA typically brings warm summer weather, with average highs around 84°F and lows near 68°F. Over 55 years of records, the warmest August 20th was in 1983 (87°F average), while the coldest was 1990 (62°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 18% of August 20th dates historically, with the wettest August 20th recording 4.85" of rain. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Philadelphia, PA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 64° | 71° | — | — |
| 2024 | 88° | 62° | 75° | — | — |
| 2023 | 82° | 64° | 73° | — | — |
| 2022 | 92° | 75° | 83° | — | — |
| 2021 | 92° | 74° | 83° | 0.33" | — |
| 2020 | 83° | 64° | 73° | 0.05" | — |
| 2019 | 95° | 76° | 85° | 0.71" | — |
| 2018 | 92° | 67° | 79° | 2.54" | — |
| 2017 | 90° | 75° | 82° | — | — |
| 2016 | 92° | 72° | 82° | — | — |
| 2015 | 94° | 76° | 85° | — | — |
| 2014 | 88° | 72° | 80° | — | — |
| 2013 | 78° | 67° | 72° | — | — |
| 2012 | 77° | 64° | 71° | — | — |
| 2011 | 87° | 73° | 80° | — | — |
| 2010 | 89° | 74° | 81° | — | — |
| 2009 | 91° | 80° | 86° | — | — |
| 2008 | 82° | 63° | 72° | — | — |
| 2007 | 66° | 60° | 63° | 2.82" | — |
| 2006 | 91° | 68° | 80° | — | — |
| 2005 | 90° | 74° | 82° | — | — |
| 2004 | 95° | 78° | 87° | 1.27" | — |
| 2003 | 90° | 72° | 81° | — | — |
| 2002 | 91° | 76° | 83° | — | — |
| 2001 | 88° | 75° | 81° | — | — |
| 2000 | 78° | 61° | 69° | — | — |
| 1999 | 73° | 65° | 69° | 2.08" | — |
| 1998 | 83° | 59° | 71° | — | — |
| 1997 | 71° | 65° | 68° | 4.85" | — |
| 1996 | 85° | 68° | 76° | — | — |
| 1995 | 85° | 63° | 74° | — | — |
| 1994 | 85° | 71° | 78° | — | — |
| 1993 | 87° | 69° | 78° | — | — |
| 1992 | 78° | 62° | 70° | — | — |
| 1991 | 78° | 69° | 74° | — | — |
| 1990coldest | 65° | 60° | 62° | — | — |
| 1989 | 84° | 70° | 77° | — | — |
| 1988 | 70° | 63° | 66° | — | — |
| 1987 | 85° | 72° | 78° | — | — |
| 1986 | 81° | 68° | 74° | — | — |
| 1985 | 85° | 70° | 77° | — | — |
| 1984 | 77° | 64° | 71° | — | — |
| 1983warmest | 101° | 73° | 87° | — | — |
| 1982 | 86° | 66° | 76° | — | — |
| 1981 | 80° | 64° | 72° | — | — |
| 1980 | 85° | 69° | 77° | — | — |
| 1979 | 84° | 67° | 75° | — | — |
| 1978 | 81° | 70° | 75° | — | — |
| 1977 | 77° | 64° | 71° | — | — |
| 1976 | 88° | 63° | 75° | — | — |
| 1975 | 82° | 64° | 73° | 0.2" | — |
| 1974 | 90° | 70° | 80° | — | — |
| 1973 | 79° | 68° | 73° | 0.38" | — |
| 1972 | 88° | 65° | 76° | — | — |
| 1971 | 87° | 70° | 78° | — | — |
55 years of data from PHILADELPHIA WSFO