Vintage weather atlas
2018 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 |
|---|---|---|---|---|
| WachauAustria | +2.4°C | +395 GDD | -144 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. |
| ChampagneFrance | +2.0°C | +387 GDD | -139 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. |
| BurgundyFrance | +1.9°C | +322 GDD | -205 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. |
| MoselGermany | +1.8°C | +338 GDD | -146 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. |
| Alsace & JuraFrance | +1.8°C | +349 GDD | -185 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 | +1.6°C | +256 GDD | -62 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Loire ValleyFrance | +1.5°C | +309 GDD | -74 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. |
| Heathcote & RutherglenAustralia | +1.3°C | +320 GDD | -133 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. |
| TuscanyItaly | +1.3°C | +260 GDD | -25 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| PiedmontItaly | +1.2°C | +246 GDD | +148 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| Po Valley & Northeast ItalyItaly | +1.1°C | +266 GDD | +51 mm | Warm weather can speed ripening and leave grapes with less acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Rhône ValleyFrance | +1.0°C | +245 GDD | +117 mm | Warm weather can speed ripening and leave grapes with less acidity. Frequent rain can mean more canopy growth and more disease pressure. |
| BordeauxFrance | +1.0°C | +213 GDD | -18 mm | Warm weather can speed ripening and leave grapes with less acidity. Frost exposure can vary sharply from one site to the next. |
| Languedoc, Roussillon & ProvenceFrance | +1.0°C | +236 GDD | +211 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. |
| Hunter ValleyAustralia | +0.9°C | +229 GDD | -48 mm | Repeated hot days can speed ripening and put vines under stress. |
| TasmaniaAustralia | +0.9°C | +181 GDD | -200 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. |
| PugliaItaly | +0.8°C | +200 GDD | +93 mm | No single weather pattern stands out in the regional record. |
| CataloniaSpain | +0.8°C | +198 GDD | +266 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. |
| Umbria & MarcheItaly | +0.8°C | +189 GDD | +15 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Barossa, Eden & Clare ValleysAustralia | +0.8°C | +193 GDD | -129 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. |
| Adelaide HillsAustralia | +0.8°C | +182 GDD | -119 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| CorsicaFrance | +0.7°C | +147 GDD | +322 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. A freeze after budbreak can damage new growth and reduce the crop. |
| Yarra Valley & Mornington PeninsulaAustralia | +0.7°C | +174 GDD | -185 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| MarlboroughNew Zealand | +0.7°C | +154 GDD | -45 mm | No single weather pattern stands out in the regional record. |
| AbruzzoItaly | +0.7°C | +136 GDD | +308 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. A freeze after budbreak can damage new growth and reduce the crop. |
| Southern ApenninesItaly | +0.7°C | +159 GDD | +163 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| Columbia GorgeUnited States | +0.6°C | +84 GDD | -60 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| Bierzo & ValdeorrasSpain | +0.6°C | +131 GDD | +46 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Central SicilyItaly | +0.6°C | +139 GDD | +259 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. |
| Rías BaixasSpain | +0.6°C | +116 GDD | -162 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Castilla y LeónSpain | +0.5°C | +124 GDD | +20 mm | Frost exposure can vary sharply from one site to the next. |
| McLaren ValeAustralia | +0.5°C | +131 GDD | -120 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Paso Robles & Santa Barbara CountyUnited States | +0.4°C | +100 GDD | +19 mm | No single weather pattern stands out in the regional record. |
| Walla Walla ValleyUnited States | +0.4°C | +56 GDD | -55 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| RiojaSpain | +0.4°C | +86 GDD | +104 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| EtnaItaly | +0.3°C | +64 GDD | +484 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. |
| Maipo ValleyChile | +0.3°C | +60 GDD | -28 mm | No single weather pattern stands out in the regional record. |
| Willamette ValleyUnited States | +0.3°C | +75 GDD | -117 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. |
| Southern OregonUnited States | +0.3°C | +36 GDD | -102 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. |
| MendozaArgentina | +0.3°C | +6 GDD | -99 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. |
| Santa Cruz MountainsUnited States | +0.3°C | +53 GDD | -44 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | +0.2°C | +68 GDD | -93 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 | +0.2°C | +70 GDD | -30 mm | Frost exposure can vary sharply from one site to the next. |
| Yakima & Central Columbia BasinUnited States | +0.2°C | +22 GDD | -18 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| StellenboschSouth Africa | +0.1°C | +35 GDD | -32 mm | No single weather pattern stands out in the regional record. |
| Southeast SpainSpain | +0.1°C | +29 GDD | +85 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| LodiUnited States | +0.1°C | +20 GDD | +27 mm | No single weather pattern stands out in the regional record. |
| DouroPortugal | +0.1°C | +53 GDD | +45 mm | Frost exposure can vary sharply from one site to the next. |
| SardiniaItaly | +0.1°C | +19 GDD | +436 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. A freeze after budbreak can damage new growth and reduce the crop. |
| Jerez & SherrySpain | -0.5°C | -119 GDD | +49 mm | No single weather pattern stands out in the regional record. |
| Margaret River & Great SouthernAustralia | -0.6°C | -151 GDD | -65 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Sonoma & MendocinoUnited States | -0.9°C | -182 GDD | +29 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.