Regions › Europe › Portugal
Portugal. Growing season April–October, harvest usually September–October. 26 vintages of weather, 2000–2025.
Photo: Rosino, CC BY-SA 2.0, via Wikimedia Commons
Over the 30 growing seasons from 1991 to 2020, Douro Valley's vines saw on average 1,650 growing degree days between April and October. That puts it in Winkler region II, close in heat and rain to Chianti Classico, Yarra Valley and Bordeaux. In a typical year about 482 mm of rain falls in the growing season, 227 mm of it in September–October.
Since 2000 the warmest season was 2022 (+23% against normal) and the coolest 2008 (-14%). The wettest harvest window was 2006, with 455 mm against a normal 227 mm.
The last 10 vintages (2016–2025) averaged +10% against the 1991–2020 normal, compared with -1% for 2000–2009; 8 of those 10 seasons were warmer than normal by more than 3%.
Growing degree days (base 10°C) for each season. The dashed line is the 1991–2020 normal (1,650 GDD) and the shaded band one standard deviation either side: about two years in three fall inside it.
Full bar: rain over the whole growing season. Dark part: rain in the harvest window (September–October). The line is the normal season total, 482 mm.
Apr–Oct 2025
Much warmer
Hot months: Jun +3.3° Jul +2.0° Aug +3.3° Oct +2.6°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 3 of 26 for heat · Winkler III
Apr–Oct 2024
Warmer
Hot months: Apr +2.4° Aug +2.6°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 12 of 26 for heat · Winkler III
Apr–Oct 2023
Much warmer
Hot months: Apr +4.1° Aug +2.3° Oct +2.4°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 4 of 26 for heat · Winkler III
Apr–Oct 2022
Much warmer
Hot months: May +4.3° Jul +4.8° Aug +3.0° Oct +3.1°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 1 of 26 for heat · Winkler IV
Apr–Oct 2021
Near normal
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 21 of 26 for heat · Winkler II
Apr–Oct 2020
Much warmer
Hot months: May +3.3° Jul +4.1°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 7 of 26 for heat · Winkler III
Apr–Oct 2019
Near normal
Hot months: May +2.3°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 19 of 26 for heat · Winkler II
Apr–Oct 2018
Warmer
Hot months: Aug +2.4° Sep +3.5°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 14 of 26 for heat · Winkler III
Apr–Oct 2017
Much warmer
Hot months: Apr +3.5° May +2.2° Jun +3.0° Oct +5.0°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 2 of 26 for heat · Winkler IV
Apr–Oct 2016
Warmer
Hot months: Jul +2.8° Aug +2.3°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 10 of 26 for heat · Winkler III
Apr–Oct 2015
Warmer
Hot months: May +2.5° Jun +2.4°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 9 of 26 for heat · Winkler III
Apr–Oct 2014
Warmer
Hot months: Oct +2.9°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 15 of 26 for heat · Winkler III
Apr–Oct 2013
Near normal
Hot months: Jul +2.0°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 17 of 26 for heat · Winkler III
Apr–Oct 2012
Much cooler
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 25 of 26 for heat · Winkler II
Apr–Oct 2011
Much warmer
Hot months: Apr +4.0° May +2.6° Oct +2.9°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 6 of 26 for heat · Winkler III
Apr–Oct 2010
Warmer
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 13 of 26 for heat · Winkler III
Apr–Oct 2009
Near normal
Hot months: Oct +2.0°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 16 of 26 for heat · Winkler III
Apr–Oct 2008
Much cooler
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 26 of 26 for heat · Winkler II
Apr–Oct 2007
Cooler
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 22 of 26 for heat · Winkler II
Apr–Oct 2006
Much warmer
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 5 of 26 for heat · Winkler III
Apr–Oct 2005
Much warmer
Hot months: Jun +3.3°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 8 of 26 for heat · Winkler III
Apr–Oct 2004
Near normal
Hot months: Jun +2.9°
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 18 of 26 for heat · Winkler II
Apr–Oct 2003
Warmer
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 11 of 26 for heat · Winkler III
Apr–Oct 2002
Much cooler
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 23 of 26 for heat · Winkler II
Apr–Oct 2001
Near normal
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 20 of 26 for heat · Winkler II
Apr–Oct 2000
Much cooler
No month ran 2°C above its normal high
Bars: mean daily high each month (red = 2°C or more above normal, blue = that much below). Line: the 1991–2020 normal.
Rank 24 of 26 for heat · Winkler II
| Vintage | GDD | vs normal | Season rain | Harvest rain | Hottest month (mean high) |
|---|---|---|---|---|---|
| 2025 | 1,940 | +17% | 449 mm | 182 mm | August 29.4°C |
| 2024 | 1,730 | +5% | 504 mm | 276 mm | August 28.7°C |
| 2023 | 1,910 | +15% | 643 mm | 426 mm | August 28.4°C |
| 2022 | 2,030 | +23% | 468 mm | 286 mm | July 30.5°C |
| 2021 | 1,630 | -2% | 501 mm | 237 mm | August 27.1°C |
| 2020 | 1,810 | +10% | 503 mm | 241 mm | July 29.8°C |
| 2019 | 1,650 | -0% | 405 mm | 148 mm | July 26.0°C |
| 2018 | 1,720 | +4% | 421 mm | 100 mm | August 28.5°C |
| 2017 | 1,950 | +18% | 191 mm | 44 mm | June 27.2°C |
| 2016 | 1,750 | +6% | 608 mm | 155 mm | July 28.5°C |
| 2015 | 1,770 | +7% | 496 mm | 280 mm | July 27.2°C |
| 2014 | 1,720 | +4% | 540 mm | 283 mm | July 24.9°C |
| 2013 | 1,690 | +2% | 451 mm | 301 mm | July 27.7°C |
| 2012 | 1,490 | -10% | 479 mm | 204 mm | August 25.2°C |
| 2011 | 1,840 | +11% | 388 mm | 194 mm | August 25.2°C |
| 2010 | 1,730 | +5% | 467 mm | 249 mm | August 27.8°C |
| 2009 | 1,700 | +2% | 330 mm | 160 mm | August 27.1°C |
| 2008 | 1,420 | -14% | 491 mm | 134 mm | August 24.5°C |
| 2007 | 1,540 | -7% | 361 mm | 90 mm | August 25.1°C |
| 2006 | 1,860 | +12% | 640 mm | 455 mm | July 26.9°C |
| 2005 | 1,810 | +9% | 475 mm | 320 mm | August 27.7°C |
| 2004 | 1,660 | +1% | 459 mm | 262 mm | June 27.1°C |
| 2003 | 1,740 | +5% | 590 mm | 305 mm | August 27.7°C |
| 2002 | 1,510 | -9% | 550 mm | 384 mm | July 25.0°C |
| 2001 | 1,640 | -1% | 439 mm | 252 mm | June 25.5°C |
| 2000 | 1,500 | -9% | 589 mm | 147 mm | June 25.3°C |
| 1991–2020 | 1,650 | ±9% (1 SD) | 482 mm | 227 mm |
The closest matches on this site by normal heat and season rain. Similar weather is one ingredient; soils, slopes and grapes differ.
