Typical Run Score
81
Great
Philadelphia · May
Running in Philadelphia in May
Typical May running conditions in Philadelphia — and a live Run Score so you can see how today compares with the norm.
Avg temperature
64°F
Warm
Avg dew point
51°F
Comfortable
Best window
6–8 AM
Local time
Philadelphia · today vs the May normTemperature · dew point · wind · timing
How May compares in Philadelphia
May ranks 5th of 12 months for running in Philadelphia, with a typical daytime Run Score of 81 (Great). For reference, the best month is November (score 89) and the hardest is July (score 56). The kindest window in May is typically 6–8 AM. Precipitation falls in roughly 13% of hours this month. Use the live tool below to see how today actually compares with the May norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Philadelphia in May: FAQ
Is it good to run in Philadelphia in May?
Yes — it's one of the better months to run here. The typical daytime Run Score is 81 (Great), with temperatures around 64°F (18°C) and comfortable dew points. The best window is usually 6–8 AM.
How hot is it for running in Philadelphia in May?
Typical temperatures average 64°F (18°C) (Warm) with dew points near 51°F. Dew point — not the thermometer — usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 97+ is Perfect, 80–96 is Great — conditions are actively working in your favour. 65–79 (Good) is solid. 45–64 (Mixed) means at least one factor — usually heat or dew point — is taxing you. Below 45 (Poor), expect a noticeably harder effort or hold back for safety.
Why does dew point matter more than temperature?
Your body cools by evaporating sweat. When the dew point climbs above roughly 60°F, the air is too saturated for sweat to evaporate efficiently, so heat builds up even if the thermometer looks reasonable. That's why a 70°F muggy morning can feel harder than a dry 80°F afternoon.
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