Philadelphia weather in October
October in Philadelphia: nice, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Philadelphia · #255 of 604 destinations to visit in October · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Philadelphia climate normals — October
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 108 mm / 4.3 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 7 h/day | |
| Daylight | 11.1 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Philadelphia in October — FAQ
- Is October a good time to visit Philadelphia?
- October in Philadelphia: nice, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Philadelphia on SeasonMap's comfort score (81/100).
- What is the weather like in Philadelphia in October?
- In October, Philadelphia averages a daily high of 19.8°C and a low of 11.7°C, with about 108.1 mm of rain over roughly 10.2 rainy days.
- What is the air quality in Philadelphia in October?
- Philadelphia has a mean US Air Quality Index of about 42 in October.