Philadelphia weather in May 2025

Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Philadelphia in May. Check more long-term weather averages for Philadelphia in May before you book your next holiday to Pennsylvania in 2025/2026.

  • 23°C maximum daytime temperature in May in Philadelphia23
    23°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Philadelphia11
    11 days with some rainfall
  • 11°C minimum night-time temperature in May in Philadelphia11
    11°C min night temperature
  • 14 hours of daylight per day in May in Philadelphia14
    14 hours of daylight per day
  • No heat & humidity in May in Philadelphia0
    No heat & humidity
  • 100 mm monthly rainfall in May in Philadelphia100
    100 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Philadelphia8
    8 (Very High) UV index

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The May weather guide for Pennsylvania (Philadelphia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Philadelphia in May?

Daytime temperatures usually reach 23°C in Philadelphia in May, falling to 11°C at night.

How sunny is it in Philadelphia in May?

There are normally 8 hours of bright sunshine each day in Philadelphia in May - that's 55% of daylight hours.

Does it rain in Philadelphia in May?

There are usually 11 days with some rain in Philadelphia in May and the average monthly rainfall is 100mm.

Philadelphia May sunrise & sunset times

Browse the sunrise and sunset times for Philadelphia in May 2025. Select a month to view Philadelphia sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:00 18:56
Friday, 16th May 2025 04:44 19:10
Saturday, 31st May 2025 04:34 19:23

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