Vintage weather atlas
2017 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 |
|---|---|---|---|---|
| Castilla y LeónSpain | +1.8°C | +345 GDD | -126 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 | +1.6°C | +281 GDD | -236 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. |
| Adelaide HillsAustralia | +1.3°C | +306 GDD | -64 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. |
| CorsicaFrance | +1.3°C | +229 GDD | -318 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. |
| DouroPortugal | +1.2°C | +265 GDD | -162 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. |
| CoonawarraAustralia | +1.2°C | +286 GDD | -13 mm | Warm weather can speed ripening and leave grapes with less acidity. |
| Central SicilyItaly | +1.2°C | +258 GDD | -112 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. |
| Heathcote & RutherglenAustralia | +1.2°C | +287 GDD | -62 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. |
| TasmaniaAustralia | +1.2°C | +238 GDD | -118 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. |
| RiojaSpain | +1.1°C | +229 GDD | -92 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 | +1.1°C | +264 GDD | -36 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| Santa Cruz MountainsUnited States | +1.1°C | +237 GDD | -26 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| McLaren ValeAustralia | +1.1°C | +259 GDD | -72 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. |
| Barossa, Eden & Clare ValleysAustralia | +1.1°C | +250 GDD | -81 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. |
| Paso Robles & Santa Barbara CountyUnited States | +1.1°C | +238 GDD | -44 mm | Warm weather can speed ripening and leave grapes with less acidity. |
| Hunter ValleyAustralia | +1.0°C | +250 GDD | -172 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 | +1.0°C | +208 GDD | -246 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. |
| SardiniaItaly | +1.0°C | +208 GDD | -228 mm | 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. Frost exposure can vary sharply from one site to the next. |
| CataloniaSpain | +0.9°C | +216 GDD | -106 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| MarlboroughNew Zealand | +0.9°C | +204 GDD | +149 mm | 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 | +0.9°C | +178 GDD | -330 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| LodiUnited States | +0.9°C | +211 GDD | +6 mm | Repeated hot days can speed ripening and put vines under stress. |
| Yarra Valley & Mornington PeninsulaAustralia | +0.9°C | +218 GDD | -58 mm | No single weather pattern stands out in the regional record. |
| Umbria & MarcheItaly | +0.9°C | +185 GDD | -160 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| AbruzzoItaly | +0.9°C | +153 GDD | -218 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. |
| Napa ValleyUnited States | +0.8°C | +195 GDD | +6 mm | Repeated hot days can speed ripening and put vines under stress. |
| Southeast SpainSpain | +0.8°C | +184 GDD | -59 mm | No single weather pattern stands out in the regional record. |
| EtnaItaly | +0.8°C | +169 GDD | -203 mm | 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. |
| Po Valley & Northeast ItalyItaly | +0.8°C | +157 GDD | -39 mm | No single weather pattern stands out in the regional record. |
| Rhône ValleyFrance | +0.8°C | +164 GDD | -228 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Walla Walla ValleyUnited States | +0.7°C | +139 GDD | +34 mm | Repeated hot days can speed ripening and put vines under stress. Frost exposure can vary sharply from one site to the next. |
| Languedoc, Roussillon & ProvenceFrance | +0.7°C | +140 GDD | -204 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| MendozaArgentina | +0.7°C | +142 GDD | -202 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. |
| Columbia GorgeUnited States | +0.7°C | +156 GDD | +48 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| TuscanyItaly | +0.7°C | +137 GDD | -179 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Loire ValleyFrance | +0.6°C | +121 GDD | -63 mm | No single weather pattern stands out in the regional record. |
| Trentino–Alto AdigeItaly | +0.6°C | +88 GDD | -21 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southern ApenninesItaly | +0.6°C | +127 GDD | -216 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| BordeauxFrance | +0.6°C | +117 GDD | -91 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| WachauAustria | +0.6°C | +100 GDD | -105 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. |
| Alsace & JuraFrance | +0.5°C | +102 GDD | -114 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. |
| Yakima & Central Columbia BasinUnited States | +0.5°C | +92 GDD | +18 mm | Repeated hot days can speed ripening and put vines under stress. Frost exposure can vary sharply from one site to the next. |
| PugliaItaly | +0.5°C | +107 GDD | -90 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| ChampagneFrance | +0.4°C | +82 GDD | -8 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southern OregonUnited States | +0.3°C | +67 GDD | -9 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Willamette ValleyUnited States | +0.3°C | +56 GDD | +123 mm | Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. |
| MoselGermany | +0.2°C | +51 GDD | -37 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| BurgundyFrance | +0.1°C | +42 GDD | -48 mm | Frost exposure can vary sharply from one site to the next. |
| Margaret River & Great SouthernAustralia | +0.1°C | +10 GDD | -34 mm | No single weather pattern stands out in the regional record. |
| StellenboschSouth Africa | +0.0°C | -2 GDD | -8 mm | No single weather pattern stands out in the regional record. |
| Maipo ValleyChile | -0.1°C | -20 GDD | -32 mm | Frost exposure can vary sharply from one site to the next. |
| Sonoma & MendocinoUnited States | -0.2°C | -33 GDD | +13 mm | No single weather pattern stands out in the regional record. |
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.