Vintage weather atlas
2023 across wine regions
Compare growing-season heat and rain with the 1991–2020 average. These regional weather records describe the season, not wine quality.
Last Updated August 20, 2026 · Data through July 14, 2026 · 52 of 52 regions
Regional departures
Growing-season values compared with 1991–2020. Rows are ordered warmest to coolest.
Scroll horizontally for all columns and vertically for more regions.
| Region | Temperature | GDD | Rain | Season summary |
|---|---|---|---|---|
| RiojaSpain | +1.9°C | +372 GDD | +25 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. Rain close to harvest can raise rot pressure and shorten the picking window. |
| BurgundyFrance | +1.8°C | +320 GDD | -117 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| PiedmontItaly | +1.8°C | +374 GDD | +20 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| Loire ValleyFrance | +1.8°C | +355 GDD | -1 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| CataloniaSpain | +1.8°C | +399 GDD | -119 mm | Warm weather can speed ripening and leave grapes with less acidity. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. A freeze after budbreak can damage new growth and reduce the crop. |
| BordeauxFrance | +1.6°C | +341 GDD | +55 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| CorsicaFrance | +1.6°C | +326 GDD | +79 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| Alsace & JuraFrance | +1.6°C | +312 GDD | -80 mm | Warm weather can speed ripening and leave grapes with less acidity. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. A freeze after budbreak can damage new growth and reduce the crop. |
| Trentino–Alto AdigeItaly | +1.5°C | +278 GDD | +47 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Languedoc, Roussillon & ProvenceFrance | +1.5°C | +327 GDD | -32 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| TuscanyItaly | +1.5°C | +318 GDD | +29 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| Rhône ValleyFrance | +1.5°C | +328 GDD | -140 mm | Warm weather can speed ripening and leave grapes with less acidity. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. Frost exposure can vary sharply from one site to the next. |
| Jerez & SherrySpain | +1.4°C | +334 GDD | -71 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Bierzo & ValdeorrasSpain | +1.4°C | +231 GDD | +127 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. |
| Southeast SpainSpain | +1.4°C | +319 GDD | +115 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. Frequent rain can mean more canopy growth and more disease pressure. |
| SardiniaItaly | +1.4°C | +306 GDD | +75 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| Castilla y LeónSpain | +1.4°C | +260 GDD | +18 mm | Warm weather can speed ripening and leave grapes with less acidity. Rain close to harvest can raise rot pressure and shorten the picking window. A freeze after budbreak can damage new growth and reduce the crop. |
| ChampagneFrance | +1.4°C | +265 GDD | +118 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. |
| Rías BaixasSpain | +1.3°C | +247 GDD | -64 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| DouroPortugal | +1.2°C | +237 GDD | -31 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| AbruzzoItaly | +1.2°C | +258 GDD | +109 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. Frost exposure can vary sharply from one site to the next. |
| WachauAustria | +1.2°C | +218 GDD | +11 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| MoselGermany | +1.1°C | +203 GDD | +112 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. |
| MendozaArgentina | +1.1°C | +238 GDD | -60 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| Po Valley & Northeast ItalyItaly | +1.0°C | +223 GDD | +107 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. |
| Umbria & MarcheItaly | +1.0°C | +219 GDD | +42 mm | No single weather pattern stands out in the regional record. |
| Hunter ValleyAustralia | +0.9°C | +236 GDD | -38 mm | No single weather pattern stands out in the regional record. |
| PugliaItaly | +0.9°C | +213 GDD | +48 mm | No single weather pattern stands out in the regional record. |
| Yakima & Central Columbia BasinUnited States | +0.9°C | +273 GDD | -30 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Columbia GorgeUnited States | +0.9°C | +231 GDD | -55 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| TasmaniaAustralia | +0.9°C | +127 GDD | -224 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. Frost exposure can vary sharply from one site to the next. |
| Southern ApenninesItaly | +0.8°C | +195 GDD | +118 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| Walla Walla ValleyUnited States | +0.8°C | +240 GDD | -60 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. A freeze after budbreak can damage new growth and reduce the crop. |
| Willamette ValleyUnited States | +0.7°C | +226 GDD | -38 mm | Frost exposure can vary sharply from one site to the next. |
| Margaret River & Great SouthernAustralia | +0.7°C | +174 GDD | -160 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Central SicilyItaly | +0.7°C | +157 GDD | -6 mm | Repeated hot days can speed ripening and put vines under stress. Frost exposure can vary sharply from one site to the next. |
| Southern OregonUnited States | +0.6°C | +159 GDD | -41 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Heathcote & RutherglenAustralia | +0.5°C | +126 GDD | +40 mm | No single weather pattern stands out in the regional record. |
| MarlboroughNew Zealand | +0.5°C | +88 GDD | -169 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| EtnaItaly | +0.5°C | +110 GDD | +150 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| StellenboschSouth Africa | +0.3°C | +82 GDD | -43 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | +0.2°C | +56 GDD | -64 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Yarra Valley & Mornington PeninsulaAustralia | +0.2°C | +49 GDD | +58 mm | No single weather pattern stands out in the regional record. |
| Barossa, Eden & Clare ValleysAustralia | +0.1°C | +26 GDD | -85 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. Frost exposure can vary sharply from one site to the next. |
| Santa Cruz MountainsUnited States | +0.1°C | +13 GDD | -64 mm | No single weather pattern stands out in the regional record. |
| Maipo ValleyChile | -0.0°C | -16 GDD | +36 mm | No single weather pattern stands out in the regional record. |
| Adelaide HillsAustralia | -0.1°C | -23 GDD | -30 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | -0.1°C | -23 GDD | -44 mm | No single weather pattern stands out in the regional record. |
| LodiUnited States | -0.2°C | -36 GDD | -30 mm | No single weather pattern stands out in the regional record. |
| Paso Robles & Santa Barbara CountyUnited States | -0.4°C | -98 GDD | +33 mm | No single weather pattern stands out in the regional record. |
| Napa ValleyUnited States | -0.6°C | -120 GDD | -29 mm | Frost exposure can vary sharply from one site to the next. |
| Sonoma & MendocinoUnited States | -0.8°C | -147 GDD | -52 mm | Frost exposure can vary sharply from one site to the next. |
Methods, limitations, and sources
How this comparison is made
Each row uses the region’s configured growing-season window and only appears when its annual summary passes the shared source, regional-rule, baseline, metric, and 95% window-completeness checks. GDD means growing degree days, a measure of accumulated warmth above each region’s published base temperature.
The map colors show mean-temperature departure from 1991–2020. GDD and rain departures use the same baseline. “Last Updated” is the oldest calculation time among the displayed rows; “Data through” is the oldest source date. This conservative rule prevents a partly refreshed atlas from appearing newer than all of its regions.
Limits
These are regional weather summaries, not vineyard measurements. Region outlines represent approximate wine-growing and weather-analysis areas, not official boundaries or individual vineyards. A regional pattern can hide meaningful differences in elevation, exposure, storms, soils, vineyard practice, and harvest timing. The weather record alone does not determine wine quality.
Source
Weather & Vines combined regional series. Combined records use eligible NOAA GHCN observations where available and ERA5 reanalysis for the regional grid and for locations or dates without eligible station coverage.