SeasonMapChicago vs Portland in September
Chicago and Portland are nearly tied in September — 91 vs 94 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air; Portland is warm, a little rain, clean air.
Chicago vs Portland — September climate, side by side
| Chicago | Portland | |
|---|---|---|
| Comfort score | 91/100 (S) | 94/100 (S) |
| Feels-like high | 25°C | 24°C |
| Avg high / low | 25° / 17° | 24° / 14° |
| Rainfall | 63 mm | 46 mm |
| Rainy days | 7 | 5 |
| Humidity | 73% | 67% |
| Air quality (AQI) | 45 | 33 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Chicago vs Portland in September — FAQ
- Is September better in Chicago or Portland?
- Chicago and Portland are nearly tied in September — 91 vs 94 on SeasonMap's comfort score. Chicago is warm, a little rain, clean air; Portland is warm, a little rain, clean air.
- What is the weather like in Chicago vs Portland in September?
- In September, Chicago averages 25°C high / 17°C low with about 63 mm of rain; Portland averages 24°C high / 14°C low with about 46 mm.