Philadelphia in May typically experiences a transition from spring to early summer. Average temperatures rise from the low 60s Fahrenheit (around 16 degrees Celsius) at the beginning of the month to the low 70s Fahrenheit (around 22 degrees Celsius) by the end. Rainfall is common, averaging around four inches throughout the month, and humidity levels begin to increase. Sunshine becomes more prevalent, with an average of around seven hours per day.
Understanding typical climatic conditions for this period allows residents and visitors to plan accordingly. Packing layers of clothing is advisable, as temperatures can fluctuate throughout the day. The pleasant conditions make it an ideal time for outdoor activities, from exploring the city’s historical sites to enjoying its numerous parks and gardens. Historically, this period marks the beginning of the city’s vibrant outdoor festival and event season.