SeasonMapPhiladelphia vs Seattle in September
Seattle is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while Philadelphia is warm, rainy, clean air.
Philadelphia vs Seattle — September climate, side by side
| Philadelphia | Seattle | |
|---|---|---|
| Comfort score | 81/100 (A) | 89/100 (A) |
| Feels-like high | 28°C | 21°C |
| Avg high / low | 27° / 18° | 21° / 12° |
| Rainfall | 101 mm | 36 mm |
| Rainy days | 7 | 6 |
| Humidity | 72% | 75% |
| Air quality (AQI) | 45 | 40 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Philadelphia vs Seattle in September — FAQ
- Is September better in Philadelphia or Seattle?
- Seattle is the better pick in September — 89 vs 81 on SeasonMap's comfort score. Seattle is nice, a little rain, clean air, while Philadelphia is warm, rainy, clean air.
- What is the weather like in Philadelphia vs Seattle in September?
- In September, Philadelphia averages 27°C high / 18°C low with about 101 mm of rain; Seattle averages 21°C high / 12°C low with about 36 mm.