Vintage weather atlas
2009 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 |
|---|---|---|---|---|
| Adelaide HillsAustralia | +1.0°C | +244 GDD | +17 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| Heathcote & RutherglenAustralia | +1.0°C | +245 GDD | +60 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. |
| Barossa, Eden & Clare ValleysAustralia | +1.0°C | +238 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. |
| Yarra Valley & Mornington PeninsulaAustralia | +1.0°C | +232 GDD | +41 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | +0.9°C | +212 GDD | +25 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | +0.8°C | +186 GDD | +66 mm | Repeated hot days can speed ripening and put vines under stress. |
| Rhône ValleyFrance | +0.8°C | +169 GDD | -65 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Hunter ValleyAustralia | +0.7°C | +168 GDD | -131 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| PiedmontItaly | +0.7°C | +147 GDD | -15 mm | Frost exposure can vary sharply from one site to the next. |
| Trentino–Alto AdigeItaly | +0.7°C | +108 GDD | -137 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. |
| Po Valley & Northeast ItalyItaly | +0.7°C | +151 GDD | -123 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. |
| Castilla y LeónSpain | +0.7°C | +130 GDD | -74 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. |
| TuscanyItaly | +0.6°C | +126 GDD | -78 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| CorsicaFrance | +0.6°C | +133 GDD | -25 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| TasmaniaAustralia | +0.6°C | +100 GDD | +32 mm | Frost exposure can vary sharply from one site to the next. |
| Languedoc, Roussillon & ProvenceFrance | +0.6°C | +117 GDD | -61 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Alsace & JuraFrance | +0.5°C | +89 GDD | -140 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. |
| RiojaSpain | +0.5°C | +107 GDD | -51 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. |
| BurgundyFrance | +0.4°C | +68 GDD | -39 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Umbria & MarcheItaly | +0.4°C | +100 GDD | +36 mm | Frost exposure can vary sharply from one site to the next. |
| WachauAustria | +0.4°C | +66 GDD | +104 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| MoselGermany | +0.3°C | +21 GDD | -2 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| BordeauxFrance | +0.3°C | +51 GDD | -37 mm | No single weather pattern stands out in the regional record. |
| Southeast SpainSpain | +0.3°C | +64 GDD | -30 mm | No single weather pattern stands out in the regional record. |
| ChampagneFrance | +0.3°C | +21 GDD | -30 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Columbia GorgeUnited States | +0.3°C | +93 GDD | -12 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| Jerez & SherrySpain | +0.2°C | +58 GDD | -106 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Margaret River & Great SouthernAustralia | +0.2°C | +58 GDD | -35 mm | No single weather pattern stands out in the regional record. |
| Loire ValleyFrance | +0.2°C | +26 GDD | -54 mm | Frost exposure can vary sharply from one site to the next. |
| Bierzo & ValdeorrasSpain | +0.2°C | +43 GDD | -81 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 | +0.2°C | +81 GDD | -181 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. |
| DouroPortugal | +0.2°C | +44 GDD | -141 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| PugliaItaly | +0.2°C | +44 GDD | +57 mm | No single weather pattern stands out in the regional record. |
| Southern ApenninesItaly | +0.1°C | +38 GDD | +93 mm | No single weather pattern stands out in the regional record. |
| Southern OregonUnited States | +0.1°C | +44 GDD | -26 mm | Repeated hot days can speed ripening and put vines under stress. A freeze after budbreak can damage new growth and reduce the crop. |
| AbruzzoItaly | +0.1°C | +42 GDD | +281 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. |
| Central SicilyItaly | +0.1°C | +28 GDD | +33 mm | No single weather pattern stands out in the regional record. |
| SardiniaItaly | +0.1°C | +21 GDD | +37 mm | Frost exposure can vary sharply from one site to the next. |
| EtnaItaly | +0.1°C | +1 GDD | +169 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. |
| Yakima & Central Columbia BasinUnited States | +0.0°C | +47 GDD | -5 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| CataloniaSpain | +0.0°C | -1 GDD | -114 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Paso Robles & Santa Barbara CountyUnited States | -0.0°C | -5 GDD | -6 mm | No single weather pattern stands out in the regional record. |
| MarlboroughNew Zealand | -0.0°C | +7 GDD | -135 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. |
| LodiUnited States | -0.1°C | -13 GDD | -5 mm | No single weather pattern stands out in the regional record. |
| StellenboschSouth Africa | -0.1°C | -19 GDD | +38 mm | No single weather pattern stands out in the regional record. |
| Walla Walla ValleyUnited States | -0.1°C | +52 GDD | +39 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Willamette ValleyUnited States | -0.1°C | +6 GDD | -34 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Santa Cruz MountainsUnited States | -0.2°C | -37 GDD | +75 mm | Rain close to harvest can raise rot pressure and shorten the picking window. Frost exposure can vary sharply from one site to the next. |
| Napa ValleyUnited States | -0.2°C | -50 GDD | -4 mm | Frost exposure can vary sharply from one site to the next. |
| Rías BaixasSpain | -0.4°C | -70 GDD | +10 mm | No single weather pattern stands out in the regional record. |
| Maipo ValleyChile | -0.5°C | -95 GDD | -6 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Sonoma & MendocinoUnited States | -1.3°C | -274 GDD | +41 mm | Cool weather can slow ripening and help grapes retain acidity. 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.