September weather in Portland OR, United States
Averages from 150 days in September across 2020–2024.
Typical conditions
| Average high | 25.1°C |
|---|---|
| Average low | 12.9°C |
| Average mean | 18.3°C |
| Total precipitation | 325.9 mm |
| Rainy days | 57 |
| Average precipitation hours | 2.7 h |
| Average max wind speed | 15.3 km/h |
| Average sunshine | 10 h/day |
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