May · United States
Best time to visit Philadelphia in May Weather, crowds & prices
Weather in Philadelphia in May
Average temperature 18°C, 115 mm of rain, about 24 days with 6+ hours of sunshine and 66% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.2/10
Ranked #3 of 12 months
- Avg temp
- 18°C
- Rainfall
- 115 mm
- Humidity
- 66%
- Days with 6h+ sun
- 24
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Philadelphia scores 8.2/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 18°C, 115 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Independence Hall history and mural-lined neighborhoods feel finest May through September.
May holds up well in Philadelphia — 3rd best month
Temperatures hover around 18°C (64°F) — the kind of month where neither heat nor cold forces the schedule.
115 mm of rain makes this a wet month here, though with about 24 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 8.2/10 on the same scale — 3rd of 12 months, versus 8.5/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Philadelphia in May?
- In May, Philadelphia averages 18°C, 115 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is May a good time to visit Philadelphia?
- May earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Philadelphia in May?
- Expect about 115 mm of rain in May. Average humidity is 66% and there are about 24 days with 6+ hours of sunshine.
Curated in Philadelphia
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Philadelphia, United States. Live activities and tours from GetYourGuide, matched to this destination.