More often than not the weather in Philadelphia during May is 16. You can expect a high of 24 with lows of 11. Discover more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 16 |
| High Temperature | 24 |
| Low Temperature | 11 |
| Sunshine Per Day | 9 |
Useful Links: Philadelphia Weather: Average Weather & Yearly Climate