Vintage weather atlas
2004 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 |
|---|---|---|---|---|
| Walla Walla ValleyUnited States | +0.8°C | +94 GDD | +22 mm | Frost exposure can vary sharply from one site to the next. |
| Willamette ValleyUnited States | +0.7°C | +120 GDD | -6 mm | No single weather pattern stands out in the regional record. |
| StellenboschSouth Africa | +0.6°C | +153 GDD | +90 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Yakima & Central Columbia BasinUnited States | +0.6°C | +72 GDD | +10 mm | Frost exposure can vary sharply from one site to the next. |
| Columbia GorgeUnited States | +0.6°C | +69 GDD | +67 mm | Frost exposure can vary sharply from one site to the next. |
| Southern OregonUnited States | +0.4°C | +76 GDD | -5 mm | Frost exposure can vary sharply from one site to the next. |
| Napa ValleyUnited States | +0.3°C | +58 GDD | -28 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Rías BaixasSpain | +0.1°C | +27 GDD | -22 mm | Frost exposure can vary sharply from one site to the next. |
| Margaret River & Great SouthernAustralia | +0.1°C | +19 GDD | -0 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Paso Robles & Santa Barbara CountyUnited States | +0.1°C | +16 GDD | +8 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Jerez & SherrySpain | +0.1°C | +14 GDD | +15 mm | No single weather pattern stands out in the regional record. |
| LodiUnited States | +0.0°C | +6 GDD | -26 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Santa Cruz MountainsUnited States | +0.0°C | +4 GDD | +34 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| BordeauxFrance | -0.0°C | -3 GDD | -42 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Rhône ValleyFrance | -0.0°C | -5 GDD | -41 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. |
| Umbria & MarcheItaly | -0.0°C | -20 GDD | +10 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| DouroPortugal | -0.1°C | +6 GDD | -70 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 | -0.1°C | -54 GDD | +110 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| Bierzo & ValdeorrasSpain | -0.1°C | +25 GDD | +62 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. |
| Loire ValleyFrance | -0.1°C | -28 GDD | -17 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Languedoc, Roussillon & ProvenceFrance | -0.1°C | -15 GDD | -31 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| RiojaSpain | -0.1°C | -13 GDD | +7 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Hunter ValleyAustralia | -0.1°C | -31 GDD | +77 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | -0.1°C | -29 GDD | -59 mm | No single weather pattern stands out in the regional record. |
| TasmaniaAustralia | -0.1°C | -55 GDD | -83 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. |
| CoonawarraAustralia | -0.1°C | -37 GDD | -78 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| TuscanyItaly | -0.2°C | -40 GDD | -2 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Alsace & JuraFrance | -0.2°C | -63 GDD | -0 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| CataloniaSpain | -0.2°C | -35 GDD | -26 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Barossa, Eden & Clare ValleysAustralia | -0.2°C | -44 GDD | -13 mm | No single weather pattern stands out in the regional record. |
| PiedmontItaly | -0.2°C | -44 GDD | -124 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. |
| Adelaide HillsAustralia | -0.2°C | -50 GDD | -37 mm | No single weather pattern stands out in the regional record. |
| BurgundyFrance | -0.2°C | -47 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. |
| Trentino–Alto AdigeItaly | -0.2°C | -36 GDD | -75 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. |
| Yarra Valley & Mornington PeninsulaAustralia | -0.2°C | -62 GDD | +76 mm | No single weather pattern stands out in the regional record. |
| Castilla y LeónSpain | -0.3°C | -34 GDD | -32 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| CorsicaFrance | -0.3°C | -44 GDD | +17 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| PugliaItaly | -0.3°C | -65 GDD | +5 mm | No single weather pattern stands out in the regional record. |
| SardiniaItaly | -0.3°C | -64 GDD | +31 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| ChampagneFrance | -0.3°C | -74 GDD | -49 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| MarlboroughNew Zealand | -0.3°C | -53 GDD | +52 mm | No single weather pattern stands out in the regional record. |
| Southeast SpainSpain | -0.3°C | -56 GDD | +71 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southern ApenninesItaly | -0.3°C | -88 GDD | +78 mm | No single weather pattern stands out in the regional record. |
| Po Valley & Northeast ItalyItaly | -0.3°C | -85 GDD | -28 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Central SicilyItaly | -0.3°C | -93 GDD | -14 mm | Frost exposure can vary sharply from one site to the next. |
| MoselGermany | -0.4°C | -95 GDD | -10 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| EtnaItaly | -0.4°C | -97 GDD | +23 mm | Frost exposure can vary sharply from one site to the next. |
| WachauAustria | -0.4°C | -139 GDD | -4 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Maipo ValleyChile | -0.5°C | -131 GDD | +43 mm | Frost exposure can vary sharply from one site to the next. |
| Heathcote & RutherglenAustralia | -0.6°C | -152 GDD | +45 mm | No single weather pattern stands out in the regional record. |
| Sonoma & MendocinoUnited States | -0.6°C | -133 GDD | +5 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| MendozaArgentina | -0.7°C | -152 GDD | +21 mm | A freeze after budbreak can damage new growth and reduce the crop. |
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.