SeasonMapPhiladelphia vs Washington in September
Philadelphia and Washington are nearly tied in September — 81 vs 80 on SeasonMap's comfort score. Philadelphia is warm, rainy, clean air; Washington is hot, rainy, clean air.
Philadelphia vs Washington — September climate, side by side
| Philadelphia | Washington | |
|---|---|---|
| Comfort score | 81/100 (A) | 80/100 (A) |
| Feels-like high | 28°C | 30°C |
| Avg high / low | 27° / 18° | 28° / 17° |
| Rainfall | 101 mm | 108 mm |
| Rainy days | 7 | 8 |
| Humidity | 72% | 74% |
| Air quality (AQI) | 45 | 47 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Philadelphia vs Washington in September — FAQ
- Is September better in Philadelphia or Washington?
- Philadelphia and Washington are nearly tied in September — 81 vs 80 on SeasonMap's comfort score. Philadelphia is warm, rainy, clean air; Washington is hot, rainy, clean air.
- What is the weather like in Philadelphia vs Washington in September?
- In September, Philadelphia averages 27°C high / 18°C low with about 101 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.