Regions › Europe › Italy
Italy. Growing season April–October, harvest usually September–October. 26 vintages of weather, 2000–2025.
Photo: John Menard, CC BY-SA 2.0, via Wikimedia Commons
Over the 30 growing seasons from 1991 to 2020, Chianti Classico's vines saw on average 1,730 growing degree days between April and October. That puts it in Winkler region III, close in heat and rain to Douro Valley, Northern Rhône and Yarra Valley. In a typical year about 485 mm of rain falls in the growing season, 204 mm of it in September–October.
Since 2000 the warmest season was 2023 (+19% against normal) and the coolest 2010 (-7%). The wettest harvest window was 2024, with 360 mm against a normal 204 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 (1,730 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, 485 mm.
Apr–Oct 2025
Much warmer
Hot months: Jun +4.9°
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 2024
Much warmer
Hot months: Jul +3.0° Aug +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 5 of 26 for heat · Winkler IV
Apr–Oct 2023
Much warmer
Hot months: Jul +2.5° Sep +3.5° Oct +4.3°
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 2022
Much warmer
Hot months: May +2.2° Jun +3.6° Jul +3.2° Oct +3.2°
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 2021
Near normal
Hot months: Sep +2.2°
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 III
Apr–Oct 2020
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 2019
Much warmer
Hot months: Jun +2.9° Oct +2.1°
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 2018
Much warmer
Hot months: Apr +3.1° Sep +2.2° Oct +2.1°
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 IV
Apr–Oct 2017
Warmer
Hot months: Jun +2.4° Aug +2.7°
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 2016
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 16 of 26 for heat · Winkler III
Apr–Oct 2015
Much warmer
Hot months: Jul +3.2°
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
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 II
Apr–Oct 2013
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 14 of 26 for heat · Winkler III
Apr–Oct 2012
Much warmer
Hot months: Aug +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 6 of 26 for heat · Winkler III
Apr–Oct 2011
Much warmer
Hot months: Apr +2.3° May +2.4° Sep +3.2°
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 2010
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 2009
Much warmer
Hot months: May +2.7° Aug +2.2°
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 2008
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 2007
Near normal
Hot months: Apr +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 20 of 26 for heat · Winkler III
Apr–Oct 2006
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 15 of 26 for heat · Winkler III
Apr–Oct 2005
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 2004
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 19 of 26 for heat · Winkler III
Apr–Oct 2003
Much warmer
Hot months: May +3.0° Jun +4.8° Jul +2.2° Aug +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 IV
Apr–Oct 2002
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
Apr–Oct 2001
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 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 III
| Vintage | GDD | vs normal | Season rain | Harvest rain | Hottest month (mean high) |
|---|---|---|---|---|---|
| 2025 | 1,880 | +9% | 494 mm | 171 mm | June 29.8°C |
| 2024 | 1,960 | +13% | 639 mm | 360 mm | August 31.9°C |
| 2023 | 2,060 | +19% | 482 mm | 184 mm | July 30.5°C |
| 2022 | 2,040 | +18% | 434 mm | 199 mm | July 31.2°C |
| 2021 | 1,750 | +2% | 397 mm | 128 mm | August 29.1°C |
| 2020 | 1,820 | +5% | 527 mm | 244 mm | August 29.5°C |
| 2019 | 1,870 | +8% | 532 mm | 155 mm | August 29.8°C |
| 2018 | 2,010 | +16% | 482 mm | 160 mm | July 29.1°C |
| 2017 | 1,850 | +7% | 326 mm | 158 mm | August 31.1°C |
| 2016 | 1,780 | +3% | 479 mm | 205 mm | July 28.8°C |
| 2015 | 1,870 | +8% | 499 mm | 264 mm | July 31.2°C |
| 2014 | 1,660 | -4% | 662 mm | 218 mm | August 25.9°C |
| 2013 | 1,810 | +5% | 521 mm | 261 mm | July 28.9°C |
| 2012 | 1,890 | +9% | 486 mm | 215 mm | August 30.9°C |
| 2011 | 1,880 | +9% | 272 mm | 92 mm | August 29.9°C |
| 2010 | 1,610 | -7% | 654 mm | 213 mm | July 29.4°C |
| 2009 | 1,870 | +8% | 382 mm | 135 mm | August 30.6°C |
| 2008 | 1,650 | -4% | 508 mm | 148 mm | August 28.9°C |
| 2007 | 1,690 | -2% | 342 mm | 144 mm | July 28.4°C |
| 2006 | 1,790 | +4% | 322 mm | 146 mm | July 30.0°C |
| 2005 | 1,650 | -4% | 457 mm | 223 mm | July 28.1°C |
| 2004 | 1,690 | -2% | 507 mm | 247 mm | August 28.3°C |
| 2003 | 2,030 | +17% | 342 mm | 205 mm | August 32.4°C |
| 2002 | 1,640 | -5% | 622 mm | 190 mm | July 26.7°C |
| 2001 | 1,640 | -5% | 464 mm | 187 mm | August 29.0°C |
| 2000 | 1,780 | +3% | 452 mm | 190 mm | August 29.3°C |
| 1991–2020 | 1,730 | ±9% (1 SD) | 485 mm | 204 mm |
The closest matches on this site by normal heat and season rain. Similar weather is one ingredient; soils, slopes and grapes differ.
