Philadelphia · May
Run in the morning.
Comfortable average high of 73°F, dipping to 54°F at night. Expect 16 rain days — plan around the radar. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
Avg high / low
73° / 54°F
Humidity
68%
Rain days
16/mo
Wind
11 mph
What May feels like in Philadelphia
Sunrise
05:45
Mid-month average
Sunset
20:09
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Philadelphia in May
The kit for May in Philadelphia: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
May vs the surrounding months
vs April
+10° avg high
+1 rain days
Philadelphia in April →
May
73°F avg high
16 rain days
Best: morning
vs June
-9° avg high
+1 rain days
Philadelphia in June →
Frequently Asked Questions
What is the best time of day to run in Philadelphia in May?+
Morning. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
What's the average temperature in Philadelphia in May?+
Average high 73°F, average low 54°F.
How does May compare to surrounding months in Philadelphia?+
Compared to April (avg high 63°F), May is warmer. Compared to June (avg high 81°F), May is cooler.
Does it rain often in Philadelphia in May?+
Expect about 16 measurable rain days in May, on average.