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Best Time for Porto & the Douro Valley
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Sweet spot: May, June, September. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- Harvest — the valley smells of crushed grapes and some quintas still tread by foot.
- Green terraces and almond blossom upstream; river cruises and N-222 at their best.
- The valley is an oven: taste early, swim or cruise mid-afternoon.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | 2.7°C | 9.7°C | 134 mm | 9.3 h | ❄ |
| February | 2.5°C | 10.9°C | 95 mm | 10.4 h | ❄ |
| March | 4.3°C | 13.7°C | 114 mm | 11.7 h | |
| April | 6.4°C | 16.3°C | 92 mm | 13.1 h | |
| May | 9.0°C | 20.0°C | 59 mm | 14.3 h | |
| June | 12.4°C | 25.1°C | 33 mm | 14.9 h | |
| July | 14.3°C | 29.2°C | 14 mm | 14.7 h | |
| August | 14.5°C | 29.4°C | 22 mm | 13.7 h | |
| September | 12.6°C | 25.8°C | 46 mm | 12.3 h | |
| October | 9.5°C | 19.6°C | 137 mm | 10.9 h | |
| November | 5.3°C | 13.2°C | 132 mm | 9.6 h | |
| December | 2.9°C | 10.3°C | 123 mm | 9.0 h |