Vintage weather atlas
1999 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 |
|---|---|---|---|---|
| EtnaItaly | +1.0°C | +218 GDD | -238 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 | +1.0°C | +225 GDD | +3 mm | Frost exposure can vary sharply from one site to the next. |
| Central SicilyItaly | +0.8°C | +186 GDD | -148 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. |
| Southeast SpainSpain | +0.6°C | +137 GDD | -57 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | +0.5°C | +111 GDD | +36 mm | No single weather pattern stands out in the regional record. |
| StellenboschSouth Africa | +0.5°C | +130 GDD | -76 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| CorsicaFrance | +0.5°C | +100 GDD | +25 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| TuscanyItaly | +0.4°C | +83 GDD | +21 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| BordeauxFrance | +0.3°C | +61 GDD | +119 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. |
| ChampagneFrance | +0.3°C | +51 GDD | +15 mm | No single weather pattern stands out in the regional record. |
| MoselGermany | +0.3°C | +56 GDD | -48 mm | Frost exposure can vary sharply from one site to the next. |
| Loire ValleyFrance | +0.3°C | +40 GDD | +170 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. |
| Yarra Valley & Mornington PeninsulaAustralia | +0.3°C | +63 GDD | -85 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| McLaren ValeAustralia | +0.2°C | +65 GDD | +98 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Southern ApenninesItaly | +0.2°C | +60 GDD | -64 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| AbruzzoItaly | +0.2°C | +51 GDD | +55 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Adelaide HillsAustralia | +0.2°C | +56 GDD | +107 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. |
| PiedmontItaly | +0.2°C | +33 GDD | +51 mm | Frost exposure can vary sharply from one site to the next. |
| CataloniaSpain | +0.1°C | +30 GDD | -54 mm | No single weather pattern stands out in the regional record. |
| Castilla y LeónSpain | +0.1°C | +3 GDD | +73 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. |
| Po Valley & Northeast ItalyItaly | +0.1°C | +21 GDD | -3 mm | Frost exposure can vary sharply from one site to the next. |
| Alsace & JuraFrance | +0.1°C | +8 GDD | +124 mm | Frequent rain can mean more canopy growth and more disease pressure. Frost exposure can vary sharply from one site to the next. |
| Rhône ValleyFrance | +0.1°C | +18 GDD | +193 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. |
| Umbria & MarcheItaly | +0.1°C | +26 GDD | +41 mm | No single weather pattern stands out in the regional record. |
| TasmaniaAustralia | +0.1°C | -6 GDD | -115 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. |
| BurgundyFrance | +0.1°C | +20 GDD | +26 mm | Frost exposure can vary sharply from one site to the next. |
| PugliaItaly | +0.1°C | +14 GDD | +19 mm | No single weather pattern stands out in the regional record. |
| Barossa, Eden & Clare ValleysAustralia | +0.1°C | +14 GDD | +83 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Jerez & SherrySpain | +0.0°C | +10 GDD | +65 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| RiojaSpain | +0.0°C | -2 GDD | +33 mm | Frost exposure can vary sharply from one site to the next. |
| Languedoc, Roussillon & ProvenceFrance | +0.0°C | -4 GDD | +50 mm | No single weather pattern stands out in the regional record. |
| Margaret River & Great SouthernAustralia | -0.1°C | -21 GDD | +107 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| MarlboroughNew Zealand | -0.1°C | -46 GDD | +39 mm | Frost exposure can vary sharply from one site to the next. |
| Rías BaixasSpain | -0.1°C | -29 GDD | +207 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 | -0.2°C | -24 GDD | +93 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| WachauAustria | -0.2°C | -70 GDD | +38 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| DouroPortugal | -0.2°C | -52 GDD | +75 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Heathcote & RutherglenAustralia | -0.3°C | -84 GDD | +17 mm | No single weather pattern stands out in the regional record. |
| Bierzo & ValdeorrasSpain | -0.4°C | -82 GDD | +155 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. |
| Trentino–Alto AdigeItaly | -0.4°C | -92 GDD | +133 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. |
| Napa ValleyUnited States | -0.6°C | -144 GDD | -7 mm | Frost exposure can vary sharply from one site to the next. |
| MendozaArgentina | -0.8°C | -209 GDD | +328 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. |
| Willamette ValleyUnited States | -0.8°C | -149 GDD | -95 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. |
| Walla Walla ValleyUnited States | -0.9°C | -152 GDD | -71 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 | -0.9°C | -132 GDD | -79 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 | -0.9°C | -174 GDD | -27 mm | No single weather pattern stands out in the regional record. |
| Hunter ValleyAustralia | -1.0°C | -225 GDD | +170 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. |
| Columbia GorgeUnited States | -1.0°C | -144 GDD | -98 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. |
| LodiUnited States | -1.1°C | -247 GDD | -59 mm | Cool weather can slow ripening and help grapes retain acidity. |
| Yakima & Central Columbia BasinUnited States | -1.1°C | -224 GDD | -53 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| Paso Robles & Santa Barbara CountyUnited States | -1.2°C | -264 GDD | +56 mm | Cool weather can slow ripening and help grapes retain acidity. |
| Sonoma & MendocinoUnited States | -1.6°C | -319 GDD | -33 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.