May weather in Philadelphia, PA
The average temperature in Philadelphia in May is 66.0°F (56.3°F–75.7°F). Average precipitation: 4.06 inches.
May is a spring month in Philadelphia, and is warmer than the annual average of 57.7°F. Daily temperatures swing about 19.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 13m. For travel, May is a comfortable month to visit.
Avg High
75.7°F
Avg Low
56.3°F
Precipitation
4.06 in
Daylight
14h 13m
May records in Philadelphia
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2001) | 45.0°F (1996) | 2.00 in (2014) |
| May 2 | 91.9°F (2010) | 42.1°F (2019) | 0.42 in (1997) |
| May 3 | 91.0°F (2001) | 42.1°F (2005) | 1.18 in (2010) |
| May 4 | 95.0°F (2001) | 43.0°F (2004) | 0.58 in (2009) |
| May 5 | 91.0°F (2018) | 45.0°F (2005) | 0.33 in (2009) |
| May 6 | 90.0°F (2000) | 44.1°F (1996) | 1.20 in (2017) |
| May 7 | 93.0°F (2000) | 42.1°F (1996) | 1.47 in (2022) |
| May 8 | 93.9°F (2000) | 42.1°F (2022) | 1.62 in (1998) |
| May 9 | 91.9°F (2000) | 46.0°F (1995) | 0.67 in (1998) |
| May 10 | 89.1°F (2004) | 42.1°F (2010) | 0.74 in (2000) |
| May 11 | 90.0°F (2004) | 46.9°F (2024) | 0.87 in (2006) |
| May 12 | 88.0°F (2004) | 46.0°F (2008) | 0.64 in (2002) |
| May 13 | 89.1°F (2023) | 39.9°F (1996) | 1.23 in (2018) |
| May 14 | 88.0°F (2004) | 41.0°F (1996) | 1.07 in (2009) |
| May 15 | 89.1°F (1998) | 46.0°F (2019) | 9.60 in (2006) |
| May 16 | 93.9°F (1998) | 46.9°F (1996) | 0.90 in (2012) |
| May 17 | 84.9°F (2015) | 43.0°F (2016) | 1.87 in (2002) |
| May 18 | 93.0°F (2017) | 45.0°F (2009) | 0.46 in (2010) |
| May 19 | 93.9°F (2017) | 44.1°F (2002) | 1.00 in (2000) |
| May 20 | 97.0°F (1996) | 44.1°F (2002) | 0.83 in (1996) |
| May 21 | 91.0°F (1996) | 43.0°F (2002) | 0.81 in (2001) |
| May 22 | 93.9°F (1996) | 45.0°F (2002) | 1.38 in (2016) |
| May 23 | 97.0°F (2022) | 50.0°F (2015) | 0.40 in (2017) |
| May 24 | 93.0°F (1994) | 51.1°F (2005) | 2.83 in (1999) |
| May 25 | 91.0°F (2004) | 46.9°F (2013) | 2.14 in (2003) |
| May 26 | 91.9°F (2011) | 51.1°F (2009) | 1.85 in (2017) |
| May 27 | 93.0°F (2010) | 46.9°F (1994) | 0.82 in (2021) |
| May 28 | 93.0°F (2018) | 46.0°F (1994) | 1.19 in (2022) |
| May 29 | 98.1°F (2006) | 48.0°F (2021) | 1.70 in (2021) |
| May 30 | 95.0°F (1999) | 46.0°F (2021) | 2.40 in (2016) |
| May 31 | 97.0°F (2011) | 48.0°F (2021) | 1.54 in (2003) |