Vintage weather atlas
2015 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 |
|---|---|---|---|---|
| Yakima & Central Columbia BasinUnited States | +1.9°C | +353 GDD | -44 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| Walla Walla ValleyUnited States | +1.7°C | +291 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. Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Columbia GorgeUnited States | +1.7°C | +298 GDD | -128 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 | +1.6°C | +397 GDD | -95 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. |
| CoonawarraAustralia | +1.4°C | +351 GDD | -117 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. |
| TasmaniaAustralia | +1.4°C | +239 GDD | -263 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. |
| Paso Robles & Santa Barbara CountyUnited States | +1.4°C | +310 GDD | -59 mm | Warm weather can speed ripening and leave grapes with less acidity. |
| Barossa, Eden & Clare ValleysAustralia | +1.3°C | +320 GDD | -70 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. |
| Yarra Valley & Mornington PeninsulaAustralia | +1.3°C | +318 GDD | -171 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. |
| Willamette ValleyUnited States | +1.3°C | +253 GDD | -134 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. |
| Adelaide HillsAustralia | +1.3°C | +315 GDD | -97 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. |
| Southern OregonUnited States | +1.3°C | +245 GDD | -130 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. |
| Santa Cruz MountainsUnited States | +1.1°C | +231 GDD | -62 mm | Warm weather can speed ripening and leave grapes with less acidity. |
| Trentino–Alto AdigeItaly | +1.0°C | +182 GDD | -97 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. |
| LodiUnited States | +1.0°C | +232 GDD | -69 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. |
| McLaren ValeAustralia | +1.0°C | +249 GDD | -102 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. |
| CataloniaSpain | +0.9°C | +222 GDD | -17 mm | No single weather pattern stands out in the regional record. |
| Southeast SpainSpain | +0.9°C | +211 GDD | +56 mm | Repeated hot days can speed ripening and put vines under stress. |
| CorsicaFrance | +0.8°C | +159 GDD | -12 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Castilla y LeónSpain | +0.8°C | +143 GDD | -25 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| WachauAustria | +0.8°C | +142 GDD | -95 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. A freeze after budbreak can damage new growth and reduce the crop. |
| Bierzo & ValdeorrasSpain | +0.8°C | +87 GDD | +10 mm | 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. |
| AbruzzoItaly | +0.8°C | +161 GDD | +71 mm | 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. |
| SardiniaItaly | +0.7°C | +153 GDD | +4 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southern ApenninesItaly | +0.7°C | +158 GDD | +102 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. |
| TuscanyItaly | +0.7°C | +151 GDD | +26 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Napa ValleyUnited States | +0.7°C | +166 GDD | -101 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| PugliaItaly | +0.7°C | +154 GDD | +77 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Umbria & MarcheItaly | +0.7°C | +143 GDD | +50 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Rías BaixasSpain | +0.7°C | +119 GDD | +10 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Margaret River & Great SouthernAustralia | +0.6°C | +159 GDD | +71 mm | No single weather pattern stands out in the regional record. |
| Po Valley & Northeast ItalyItaly | +0.6°C | +126 GDD | -24 mm | No single weather pattern stands out in the regional record. |
| BurgundyFrance | +0.6°C | +108 GDD | -14 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| StellenboschSouth Africa | +0.6°C | +147 GDD | -13 mm | No single weather pattern stands out in the regional record. |
| Languedoc, Roussillon & ProvenceFrance | +0.6°C | +119 GDD | +15 mm | No single weather pattern stands out in the regional record. |
| DouroPortugal | +0.5°C | +101 GDD | -21 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Hunter ValleyAustralia | +0.5°C | +139 GDD | +104 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| Jerez & SherrySpain | +0.5°C | +113 GDD | -9 mm | No single weather pattern stands out in the regional record. |
| RiojaSpain | +0.5°C | +78 GDD | -41 mm | Frost exposure can vary sharply from one site to the next. |
| Alsace & JuraFrance | +0.5°C | +98 GDD | -131 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. A freeze after budbreak can damage new growth and reduce the crop. |
| Rhône ValleyFrance | +0.5°C | +100 GDD | +67 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| MarlboroughNew Zealand | +0.4°C | +105 GDD | -100 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| PiedmontItaly | +0.4°C | +69 GDD | +46 mm | Frost exposure can vary sharply from one site to the next. |
| Central SicilyItaly | +0.2°C | +47 GDD | +94 mm | No single weather pattern stands out in the regional record. |
| EtnaItaly | +0.2°C | +46 GDD | +205 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 | +4 GDD | -115 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. |
| Loire ValleyFrance | +0.1°C | +11 GDD | -13 mm | Frost exposure can vary sharply from one site to the next. |
| BordeauxFrance | +0.1°C | +12 GDD | -37 mm | No single weather pattern stands out in the regional record. |
| ChampagneFrance | +0.1°C | +14 GDD | -68 mm | Frost exposure can vary sharply from one site to the next. |
| Sonoma & MendocinoUnited States | +0.0°C | +6 GDD | -65 mm | No single weather pattern stands out in the regional record. |
| Maipo ValleyChile | -0.1°C | -22 GDD | +338 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. Frost exposure can vary sharply from one site to the next. |
| MendozaArgentina | -1.2°C | -236 GDD | +432 mm | Cool weather can slow ripening and help grapes retain 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. |
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.