Is Philadelphia hot in May?
Days are typically mild at 23.9°C, while nights average 13.8°C.
United States · 1991–2020 normal
Philadelphia in
May.
Typical May weather in Philadelphia: 23.9°C by day, 13.8°C at night, 111 mm of rain over 10.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high23.9°C
Typical low13.8°C
Rain111 mm
Wet days10.9
In the year-round weather comparison, May scores 80 out of 100, the highest of the year. Daylight is calculated as 14 h 22 from latitude 39.95°.
May at a glance
What is Philadelphia like in May?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 111 mm across about 11 wet days.
How much daylight is there?
There are about 14 h 22 between sunrise and sunset at mid-month, calculated from the place latitude.
Is May a good time to visit?
May is the strongest month in our year-round weather comparison.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4560349
- NOAA station
- USC00366886 · PHILA FRANKLIN INST
- Station distance
- 1 km from the place centre
- Coverage
- Strong coverage · 25 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Philadelphia is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
How travel partnerships will work