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France. Growing season April–October, harvest usually September–October. 26 vintages of weather, 2000–2025.
Photo: Einaz80, CC BY-SA 4.0, via Wikimedia Commons
Over the 30 growing seasons from 1991 to 2020, Alsace's vines saw on average 1,360 growing degree days between April and October. That puts it in Winkler region I, close in heat and rain to Loire Valley (Touraine), Tokaj and Burgundy (Côte d'Or). In a typical year about 369 mm of rain falls in the growing season, 100 mm of it in September–October.
Since 2000 the warmest season was 2018 (+31% against normal) and the coolest 2002 (-12%). The wettest harvest window was 2013, with 153 mm against a normal 100 mm.
The last 10 vintages (2016–2025) averaged +13% 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 (1,360 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, 369 mm.
Apr–Oct 2025
Much warmer
Hot months: Apr +2.1° Jun +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 8 of 26 for heat · Winkler II
Apr–Oct 2024
Much warmer
Hot months: Aug +2.8° 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 6 of 26 for heat · Winkler II
Apr–Oct 2023
Much warmer
Hot months: Jun +4.5° Sep +5.5° Oct +4.0°
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 2022
Much warmer
Hot months: May +3.0° Jun +3.8° Jul +3.9° Aug +3.7° Oct +4.6°
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 III
Apr–Oct 2021
Cooler
Hot months: Jun +2.3° Sep +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 23 of 26 for heat · Winkler I
Apr–Oct 2020
Much warmer
Hot months: Apr +4.7° Jul +2.1° Sep +2.8°
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 II
Apr–Oct 2019
Much warmer
Hot months: Jun +2.9° Jul +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 10 of 26 for heat · Winkler II
Apr–Oct 2018
Much warmer
Hot months: Apr +4.1° May +2.2° Jul +2.8° Aug +2.7° Sep +3.5° 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 1 of 26 for heat · Winkler III
Apr–Oct 2017
Much warmer
Hot months: Jun +3.6° Oct +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 7 of 26 for heat · Winkler II
Apr–Oct 2016
Near normal
Hot months: Sep +3.9°
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 I
Apr–Oct 2015
Warmer
Hot months: Jul +4.4° 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 13 of 26 for heat · Winkler II
Apr–Oct 2014
Warmer
Hot months: Jun +2.2° 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 12 of 26 for heat · Winkler II
Apr–Oct 2013
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 18 of 26 for heat · Winkler I
Apr–Oct 2012
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 21 of 26 for heat · Winkler I
Apr–Oct 2011
Warmer
Hot months: Apr +4.1° May +3.2° Sep +2.5°
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 II
Apr–Oct 2010
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 I
Apr–Oct 2009
Warmer
Hot months: Apr +2.6° 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 14 of 26 for heat · Winkler II
Apr–Oct 2008
Much cooler
Hot months: May +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 24 of 26 for heat · Winkler I
Apr–Oct 2007
Near normal
Hot months: Apr +5.7°
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 I
Apr–Oct 2006
Much warmer
Hot months: Jul +4.1° Sep +2.4° 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 9 of 26 for heat · Winkler II
Apr–Oct 2005
Warmer
Hot months: Oct +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 15 of 26 for heat · Winkler II
Apr–Oct 2004
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 I
Apr–Oct 2003
Much warmer
Hot months: Jun +5.6° Aug +5.5°
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 II
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 26 of 26 for heat · Winkler I
Apr–Oct 2001
Near normal
Hot months: Oct +3.7°
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 I
Apr–Oct 2000
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 17 of 26 for heat · Winkler I
| Vintage | GDD | vs normal | Season rain | Harvest rain | Hottest month (mean high) |
|---|---|---|---|---|---|
| 2025 | 1,510 | +12% | 423 mm | 144 mm | June 29.0°C |
| 2024 | 1,520 | +12% | 491 mm | 116 mm | August 29.1°C |
| 2023 | 1,680 | +24% | 331 mm | 81 mm | June 29.4°C |
| 2022 | 1,730 | +28% | 333 mm | 133 mm | July 30.8°C |
| 2021 | 1,260 | -7% | 413 mm | 64 mm | June 27.2°C |
| 2020 | 1,550 | +14% | 319 mm | 96 mm | July 29.0°C |
| 2019 | 1,470 | +9% | 352 mm | 112 mm | July 29.5°C |
| 2018 | 1,770 | +31% | 229 mm | 46 mm | July 29.7°C |
| 2017 | 1,520 | +12% | 301 mm | 72 mm | June 28.5°C |
| 2016 | 1,380 | +1% | 399 mm | 60 mm | August 27.7°C |
| 2015 | 1,460 | +7% | 295 mm | 100 mm | July 31.3°C |
| 2014 | 1,460 | +7% | 396 mm | 94 mm | June 27.1°C |
| 2013 | 1,340 | -1% | 447 mm | 153 mm | July 28.9°C |
| 2012 | 1,310 | -3% | 388 mm | 101 mm | August 27.6°C |
| 2011 | 1,460 | +8% | 320 mm | 70 mm | August 26.7°C |
| 2010 | 1,190 | -12% | 425 mm | 88 mm | July 28.8°C |
| 2009 | 1,450 | +7% | 325 mm | 57 mm | August 27.7°C |
| 2008 | 1,230 | -9% | 393 mm | 128 mm | July 26.2°C |
| 2007 | 1,320 | -2% | 375 mm | 47 mm | June 24.8°C |
| 2006 | 1,490 | +10% | 462 mm | 127 mm | July 31.0°C |
| 2005 | 1,400 | +3% | 327 mm | 76 mm | June 26.9°C |
| 2004 | 1,270 | -6% | 357 mm | 117 mm | July 25.7°C |
| 2003 | 1,630 | +20% | 323 mm | 97 mm | August 31.8°C |
| 2002 | 1,190 | -12% | 434 mm | 135 mm | June 26.5°C |
| 2001 | 1,340 | -1% | 385 mm | 122 mm | August 27.0°C |
| 2000 | 1,350 | -1% | 408 mm | 116 mm | August 26.5°C |
| 1991–2020 | 1,360 | ±11% (1 SD) | 369 mm | 100 mm |
The closest matches on this site by normal heat and season rain. Similar weather is one ingredient; soils, slopes and grapes differ.
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