May weather in Portland OR, United States
Averages from 155 days in May across 2020–2024.
Typical conditions
| Average high | 18.9°C |
|---|---|
| Average low | 8.4°C |
| Average mean | 13.3°C |
| Total precipitation | 488.1 mm |
| Rainy days | 94 |
| Average precipitation hours | 5.6 h |
| Average max wind speed | 16 km/h |
| Average sunshine | 10.1 h/day |
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