August weather in Philadelphia, PA
The average temperature in Philadelphia in August is 78.3°F (69.5°F–87.2°F). Average precipitation: 4.95 inches.
August is a summer month in Philadelphia, and is warmer than the annual average of 57.7°F. Daily temperatures swing about 17.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 35m. For travel, August is a comfortable month to visit.
Avg High
87.2°F
Avg Low
69.5°F
Precipitation
4.95 in
Daylight
13h 35m
August records in Philadelphia
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 100.9°F (2002) | 63.0°F (2021) | 4.49 in (2004) |
| August 2 | 102.0°F (2002) | 63.0°F (2023) | 1.45 in (2009) |
| August 3 | 102.0°F (2005) | 61.0°F (2021) | 0.92 in (2011) |
| August 4 | 102.9°F (2005) | 66.0°F (2013) | 1.15 in (2003) |
| August 5 | 102.0°F (2005) | 63.0°F (2000) | 0.92 in (2017) |
| August 6 | 96.1°F (1995) | 53.1°F (1994) | 0.75 in (1995) |
| August 7 | 100.0°F (2001) | 59.0°F (1994) | 1.74 in (1993) |
| August 8 | 100.0°F (2001) | 62.1°F (1994) | 2.02 in (2019) |
| August 9 | 102.9°F (2001) | 62.1°F (1995) | 1.24 in (2011) |
| August 10 | 98.1°F (2022) | 60.1°F (2007) | 1.42 in (2006) |
| August 11 | 100.0°F (2005) | 60.1°F (2007) | 1.20 in (2012) |
| August 12 | 100.0°F (2002) | 61.0°F (2006) | 1.49 in (2000) |
| August 13 | 102.9°F (2005) | 60.1°F (1996) | 3.07 in (2011) |
| August 14 | 100.9°F (2002) | 62.1°F (2013) | 1.88 in (2011) |
| August 15 | 98.1°F (2016) | 59.0°F (2014) | 0.81 in (2019) |
| August 16 | 99.0°F (1997) | 61.0°F (1994) | 0.54 in (2020) |
| August 17 | 98.1°F (2002) | 62.1°F (1994) | 1.04 in (2011) |
| August 18 | 97.0°F (2002) | 62.1°F (1997) | 1.30 in (1994) |
| August 19 | 99.0°F (2002) | 61.0°F (2000) | 0.96 in (2007) |
| August 20 | 95.0°F (2004) | 59.0°F (1998) | 1.91 in (1997) |
| August 21 | 98.1°F (2005) | 55.9°F (2000) | 1.91 in (1993) |
| August 22 | 93.9°F (2003) | 55.0°F (2007) | 2.04 in (1994) |
| August 23 | 93.0°F (2017) | 57.0°F (1994) | 0.80 in (2017) |
| August 24 | 93.9°F (1998) | 62.1°F (1997) | 1.87 in (2002) |
| August 25 | 95.0°F (2021) | 61.0°F (2008) | 1.99 in (1999) |
| August 26 | 96.1°F (1993) | 60.1°F (2019) | 1.63 in (1999) |
| August 27 | 96.1°F (2021) | 60.1°F (2019) | 5.73 in (2011) |
| August 28 | 95.0°F (1993) | 60.1°F (2011) | 1.24 in (2002) |
| August 29 | 99.0°F (2024) | 61.0°F (2002) | 1.88 in (2009) |
| August 30 | 98.1°F (2018) | 57.0°F (2025) | 0.73 in (2017) |
| August 31 | 98.1°F (2018) | 57.0°F (2009) | 0.48 in (2000) |