Climate by region
Touriga Nacional
Touriga Nacional is planted across the Douro, where summer heat and water stress increase eastward and elevation creates large local differences.
Regional figures use 1991–2020 from the combined regional record · updated through Sep 13, 2026.
Climate by region
1991–2020 averages calculated from complete combined regional records.
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| Region | Growing season | Mean temperature | GDD | Rain | Hot days | Harvest rain | Last updated |
|---|---|---|---|---|---|---|---|
| DouroPortugal | Mar 15–Oct 15 | 17.3°C | 1603 GDD | 327.0 mm | 1.9 | 95.4 mm | Sep 12, 2026 |
References and alternate names
- IVDP: vine culture in the Douro reviewed 2026-09-12
- Australian Wine Research Institute: heatwaves and their effects on grapevines reviewed 2026-08-14
- UC Agriculture and Natural Resources: vineyard water demand, evapotranspiration, and vine water stress reviewed 2026-08-14
Search recognizes the alternate names listed above.