Vintage weather atlas
1996 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 |
|---|---|---|---|---|
| Maipo ValleyChile | +1.1°C | +251 GDD | -79 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. |
| Napa ValleyUnited States | +0.2°C | +54 GDD | +11 mm | Repeated hot days can speed ripening and put vines under stress. |
| Paso Robles & Santa Barbara CountyUnited States | +0.2°C | +43 GDD | -7 mm | No single weather pattern stands out in the regional record. |
| MendozaArgentina | +0.2°C | +37 GDD | +72 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| LodiUnited States | +0.2°C | +36 GDD | +24 mm | No single weather pattern stands out in the regional record. |
| Margaret River & Great SouthernAustralia | +0.1°C | +6 GDD | +75 mm | No single weather pattern stands out in the regional record. |
| Santa Cruz MountainsUnited States | +0.0°C | +1 GDD | +61 mm | No single weather pattern stands out in the regional record. |
| Southern OregonUnited States | -0.3°C | -33 GDD | +93 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. |
| Rías BaixasSpain | -0.3°C | -74 GDD | -87 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Bierzo & ValdeorrasSpain | -0.4°C | -105 GDD | -67 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Willamette ValleyUnited States | -0.4°C | -80 GDD | +126 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. |
| Columbia GorgeUnited States | -0.5°C | -59 GDD | +123 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| Yarra Valley & Mornington PeninsulaAustralia | -0.5°C | -108 GDD | -114 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Jerez & SherrySpain | -0.5°C | -112 GDD | +12 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | -0.5°C | -121 GDD | -40 mm | No single weather pattern stands out in the regional record. |
| DouroPortugal | -0.5°C | -112 GDD | -21 mm | Frost exposure can vary sharply from one site to the next. |
| Adelaide HillsAustralia | -0.5°C | -132 GDD | -51 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | -0.6°C | -139 GDD | -52 mm | No single weather pattern stands out in the regional record. |
| Hunter ValleyAustralia | -0.6°C | -147 GDD | -21 mm | No single weather pattern stands out in the regional record. |
| Barossa, Eden & Clare ValleysAustralia | -0.6°C | -145 GDD | -33 mm | No single weather pattern stands out in the regional record. |
| MarlboroughNew Zealand | -0.7°C | -173 GDD | +93 mm | No single weather pattern stands out in the regional record. |
| BordeauxFrance | -0.7°C | -149 GDD | -55 mm | Frost exposure can vary sharply from one site to the next. |
| Heathcote & RutherglenAustralia | -0.7°C | -171 GDD | -92 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. |
| Yakima & Central Columbia BasinUnited States | -0.8°C | -134 GDD | -0 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Sonoma & MendocinoUnited States | -0.8°C | -162 GDD | +81 mm | No single weather pattern stands out in the regional record. |
| Walla Walla ValleyUnited States | -0.8°C | -119 GDD | +18 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| RiojaSpain | -0.8°C | -176 GDD | -18 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Castilla y LeónSpain | -0.8°C | -185 GDD | -34 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| TasmaniaAustralia | -0.9°C | -123 GDD | +94 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southeast SpainSpain | -1.0°C | -222 GDD | +39 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Loire ValleyFrance | -1.0°C | -211 GDD | -138 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. |
| CataloniaSpain | -1.0°C | -230 GDD | -23 mm | Cool weather can slow ripening and help grapes retain acidity. |
| Southern ApenninesItaly | -1.1°C | -252 GDD | +74 mm | Cool weather can slow ripening and help grapes retain acidity. 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. |
| PugliaItaly | -1.1°C | -254 GDD | +17 mm | Cool weather can slow ripening and help grapes retain acidity. |
| AbruzzoItaly | -1.1°C | -249 GDD | +114 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. |
| Umbria & MarcheItaly | -1.1°C | -258 GDD | +114 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. |
| Languedoc, Roussillon & ProvenceFrance | -1.1°C | -255 GDD | +24 mm | Cool weather can slow ripening and help grapes retain acidity. Frost exposure can vary sharply from one site to the next. |
| MoselGermany | -1.1°C | -264 GDD | -81 mm | Cool weather can slow ripening and help grapes retain 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. |
| WachauAustria | -1.1°C | -270 GDD | +172 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. |
| Po Valley & Northeast ItalyItaly | -1.1°C | -259 GDD | +83 mm | Cool weather can slow ripening and help grapes retain acidity. 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. |
| PiedmontItaly | -1.2°C | -258 GDD | +11 mm | Cool weather can slow ripening and help grapes retain acidity. 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. |
| TuscanyItaly | -1.2°C | -259 GDD | +123 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. |
| Trentino–Alto AdigeItaly | -1.3°C | -264 GDD | -34 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Rhône ValleyFrance | -1.3°C | -296 GDD | -32 mm | Cool weather can slow ripening and help grapes retain acidity. Frost exposure can vary sharply from one site to the next. |
| EtnaItaly | -1.3°C | -279 GDD | +101 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. |
| CorsicaFrance | -1.4°C | -327 GDD | +143 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| ChampagneFrance | -1.4°C | -292 GDD | -99 mm | Cool weather can slow ripening and help grapes retain 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. |
| SardiniaItaly | -1.4°C | -316 GDD | +148 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| BurgundyFrance | -1.4°C | -267 GDD | -49 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Central SicilyItaly | -1.4°C | -320 GDD | +76 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Alsace & JuraFrance | -1.4°C | -309 GDD | -44 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| StellenboschSouth Africa | -1.7°C | -408 GDD | +167 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. |
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.