SeasonMapChicago vs Washington in September
Chicago is the better pick in September — 91 vs 80 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Washington is hot, rainy, clean air.
Chicago vs Washington — September climate, side by side
| Chicago | Washington | |
|---|---|---|
| Comfort score | 91/100 (S) | 80/100 (A) |
| Feels-like high | 25°C | 30°C |
| Avg high / low | 25° / 17° | 28° / 17° |
| Rainfall | 63 mm | 108 mm |
| Rainy days | 7 | 8 |
| Humidity | 73% | 74% |
| Air quality (AQI) | 45 | 47 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Chicago vs Washington in September — FAQ
- Is September better in Chicago or Washington?
- Chicago is the better pick in September — 91 vs 80 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air, while Washington is hot, rainy, clean air.
- What is the weather like in Chicago vs Washington in September?
- In September, Chicago averages 25°C high / 17°C low with about 63 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.