SeasonMapBoston vs Philadelphia in September
Boston is the better pick in September — 90 vs 81 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Philadelphia is warm, rainy, clean air.
Boston vs Philadelphia — September climate, side by side
| Boston | Philadelphia | |
|---|---|---|
| Comfort score | 90/100 (S) | 81/100 (A) |
| Feels-like high | 24°C | 28°C |
| Avg high / low | 24° / 15° | 27° / 18° |
| Rainfall | 83 mm | 101 mm |
| Rainy days | 7 | 7 |
| Humidity | 76% | 72% |
| Air quality (AQI) | 46 | 45 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Boston vs Philadelphia in September — FAQ
- Is September better in Boston or Philadelphia?
- Boston is the better pick in September — 90 vs 81 on SeasonMap's comfort score. Boston is warm, rainy, clean air, while Philadelphia is warm, rainy, clean air.
- What is the weather like in Boston vs Philadelphia in September?
- In September, Boston averages 24°C high / 15°C low with about 83 mm of rain; Philadelphia averages 27°C high / 18°C low with about 101 mm.