Vintage weather atlas
2003 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 |
|---|---|---|---|---|
| BurgundyFrance | +2.1°C | +365 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. |
| PiedmontItaly | +1.4°C | +343 GDD | -336 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 | +1.4°C | +312 GDD | -150 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. |
| SardiniaItaly | +1.3°C | +324 GDD | -22 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. |
| CorsicaFrance | +1.2°C | +312 GDD | -141 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 | +1.1°C | +263 GDD | -4 mm | Warm weather can speed ripening and leave grapes with less acidity. Repeated hot days can speed ripening and put vines under stress. |
| Alsace & JuraFrance | +1.1°C | +307 GDD | -98 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. |
| Rhône ValleyFrance | +1.0°C | +252 GDD | -76 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. |
| Umbria & MarcheItaly | +1.0°C | +268 GDD | -125 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. |
| Loire ValleyFrance | +1.0°C | +249 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. |
| RiojaSpain | +1.0°C | +209 GDD | +59 mm | Repeated hot days can speed ripening and put vines under stress. 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. |
| Walla Walla ValleyUnited States | +1.0°C | +210 GDD | -40 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| EtnaItaly | +0.9°C | +213 GDD | +264 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 | +0.8°C | +180 GDD | -148 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. 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. |
| Po Valley & Northeast ItalyItaly | +0.8°C | +240 GDD | -287 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. |
| Languedoc, Roussillon & ProvenceFrance | +0.8°C | +208 GDD | -33 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. |
| Columbia GorgeUnited States | +0.8°C | +171 GDD | -92 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. |
| Yakima & Central Columbia BasinUnited States | +0.8°C | +154 GDD | -41 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Castilla y LeónSpain | +0.7°C | +144 GDD | +48 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. |
| DouroPortugal | +0.7°C | +119 GDD | +69 mm | No single weather pattern stands out in the regional record. |
| Southern ApenninesItaly | +0.7°C | +195 GDD | +1 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. |
| Rías BaixasSpain | +0.7°C | +121 GDD | -12 mm | No single weather pattern stands out in the regional record. |
| Bierzo & ValdeorrasSpain | +0.6°C | +115 GDD | +45 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. |
| Central SicilyItaly | +0.6°C | +164 GDD | +151 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. |
| MoselGermany | +0.6°C | +218 GDD | -77 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. |
| ChampagneFrance | +0.5°C | +185 GDD | -73 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. |
| CataloniaSpain | +0.5°C | +125 GDD | +18 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| PugliaItaly | +0.5°C | +135 GDD | -40 mm | No single weather pattern stands out in the regional record. |
| Willamette ValleyUnited States | +0.5°C | +120 GDD | -43 mm | Frost exposure can vary sharply from one site to the next. |
| WachauAustria | +0.5°C | +245 GDD | -104 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. |
| AbruzzoItaly | +0.5°C | +180 GDD | -114 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. |
| Southern OregonUnited States | +0.5°C | +134 GDD | -28 mm | Repeated hot days can speed ripening and put vines under stress. Frost exposure can vary sharply from one site to the next. |
| Jerez & SherrySpain | +0.4°C | +100 GDD | +109 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. |
| Southeast SpainSpain | +0.4°C | +93 GDD | +22 mm | No single weather pattern stands out in the regional record. |
| Trentino–Alto AdigeItaly | +0.4°C | +192 GDD | -200 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. |
| Paso Robles & Santa Barbara CountyUnited States | +0.2°C | +55 GDD | +45 mm | No single weather pattern stands out in the regional record. |
| Santa Cruz MountainsUnited States | +0.2°C | +43 GDD | +31 mm | No single weather pattern stands out in the regional record. |
| Hunter ValleyAustralia | +0.0°C | +10 GDD | -71 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Napa ValleyUnited States | -0.1°C | -6 GDD | +57 mm | No single weather pattern stands out in the regional record. |
| Maipo ValleyChile | -0.1°C | -10 GDD | +20 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| LodiUnited States | -0.1°C | -17 GDD | +24 mm | Repeated hot days can speed ripening and put vines under stress. |
| Barossa, Eden & Clare ValleysAustralia | -0.2°C | -35 GDD | -99 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 | -48 GDD | +2 mm | No single weather pattern stands out in the regional record. |
| MarlboroughNew Zealand | -0.2°C | -29 GDD | +73 mm | Frost exposure can vary sharply from one site to the next. |
| StellenboschSouth Africa | -0.3°C | -64 GDD | +55 mm | No single weather pattern stands out in the regional record. |
| Adelaide HillsAustralia | -0.4°C | -96 GDD | -58 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | -0.5°C | -106 GDD | -38 mm | No single weather pattern stands out in the regional record. |
| Yarra Valley & Mornington PeninsulaAustralia | -0.7°C | -147 GDD | -70 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Heathcote & RutherglenAustralia | -0.7°C | -135 GDD | -79 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. |
| Sonoma & MendocinoUnited States | -0.8°C | -164 GDD | +90 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| TasmaniaAustralia | -0.9°C | -119 GDD | +34 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| CoonawarraAustralia | -0.9°C | -200 GDD | -19 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.