Vintage weather atlas
1992 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 |
|---|---|---|---|---|
| Willamette ValleyUnited States | +1.1°C | +209 GDD | -108 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. |
| Walla Walla ValleyUnited States | +1.0°C | +135 GDD | -12 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Southern OregonUnited States | +0.9°C | +157 GDD | +23 mm | Frost exposure can vary sharply from one site to the next. |
| Columbia GorgeUnited States | +0.9°C | +140 GDD | -13 mm | Frost exposure can vary sharply from one site to the next. |
| LodiUnited States | +0.8°C | +183 GDD | -54 mm | No single weather pattern stands out in the regional record. |
| Paso Robles & Santa Barbara CountyUnited States | +0.8°C | +170 GDD | -21 mm | No single weather pattern stands out in the regional record. |
| Napa ValleyUnited States | +0.7°C | +173 GDD | -19 mm | No single weather pattern stands out in the regional record. |
| Santa Cruz MountainsUnited States | +0.7°C | +154 GDD | -42 mm | No single weather pattern stands out in the regional record. |
| Yakima & Central Columbia BasinUnited States | +0.6°C | +89 GDD | +7 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Maipo ValleyChile | +0.4°C | +88 GDD | +8 mm | Frost exposure can vary sharply from one site to the next. |
| Sonoma & MendocinoUnited States | -0.0°C | -10 GDD | +36 mm | No single weather pattern stands out in the regional record. |
| WachauAustria | -0.1°C | +60 GDD | -147 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. |
| TasmaniaAustralia | -0.2°C | -32 GDD | +5 mm | Frost exposure can vary sharply from one site to the next. |
| BurgundyFrance | -0.3°C | -47 GDD | +58 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. |
| Alsace & JuraFrance | -0.3°C | -23 GDD | +27 mm | Frost exposure can vary sharply from one site to the next. |
| PugliaItaly | -0.3°C | -78 GDD | -48 mm | No single weather pattern stands out in the regional record. |
| Yarra Valley & Mornington PeninsulaAustralia | -0.5°C | -95 GDD | +252 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| DouroPortugal | -0.5°C | -87 GDD | -41 mm | No single weather pattern stands out in the regional record. |
| CoonawarraAustralia | -0.5°C | -101 GDD | +161 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| MoselGermany | -0.5°C | -24 GDD | +25 mm | Frost exposure can vary sharply from one site to the next. |
| Southern ApenninesItaly | -0.5°C | -115 GDD | -48 mm | No single weather pattern stands out in the regional record. |
| MendozaArgentina | -0.6°C | -126 GDD | +245 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| McLaren ValeAustralia | -0.6°C | -138 GDD | +236 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| StellenboschSouth Africa | -0.6°C | -150 GDD | +168 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. |
| Po Valley & Northeast ItalyItaly | -0.7°C | -145 GDD | +74 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. |
| TuscanyItaly | -0.7°C | -146 GDD | +202 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. |
| AbruzzoItaly | -0.7°C | -153 GDD | -24 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Rías BaixasSpain | -0.7°C | -147 GDD | +21 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Hunter ValleyAustralia | -0.8°C | -189 GDD | -14 mm | No single weather pattern stands out in the regional record. |
| Castilla y LeónSpain | -0.8°C | -147 GDD | +40 mm | Frost exposure can vary sharply from one site to the next. |
| Umbria & MarcheItaly | -0.8°C | -175 GDD | +52 mm | Frost exposure can vary sharply from one site to the next. |
| ChampagneFrance | -0.8°C | -113 GDD | +0 mm | Frost exposure can vary sharply from one site to the next. |
| Loire ValleyFrance | -0.8°C | -140 GDD | +21 mm | Frost exposure can vary sharply from one site to the next. |
| Trentino–Alto AdigeItaly | -0.8°C | -109 GDD | +69 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. |
| Jerez & SherrySpain | -0.9°C | -203 GDD | +57 mm | No single weather pattern stands out in the regional record. |
| Adelaide HillsAustralia | -0.9°C | -212 GDD | +258 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| EtnaItaly | -1.0°C | -198 GDD | +16 mm | Frost exposure can vary sharply from one site to the next. |
| Barossa, Eden & Clare ValleysAustralia | -1.0°C | -228 GDD | +266 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| Languedoc, Roussillon & ProvenceFrance | -1.0°C | -203 GDD | +184 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. |
| Rhône ValleyFrance | -1.0°C | -213 GDD | +115 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. |
| BordeauxFrance | -1.0°C | -212 GDD | +168 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. |
| Heathcote & RutherglenAustralia | -1.1°C | -244 GDD | +309 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. Frost exposure can vary sharply from one site to the next. |
| CorsicaFrance | -1.1°C | -201 GDD | +173 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. |
| Southeast SpainSpain | -1.1°C | -241 GDD | -11 mm | Cool weather can slow ripening and help grapes retain acidity. |
| Margaret River & Great SouthernAustralia | -1.1°C | -259 GDD | +81 mm | Cool weather can slow ripening and help grapes retain acidity. |
| SardiniaItaly | -1.1°C | -232 GDD | +109 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. |
| Bierzo & ValdeorrasSpain | -1.2°C | -200 GDD | -4 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 | -1.2°C | -254 GDD | +8 mm | Cool weather can slow ripening and help grapes retain acidity. A freeze after budbreak can damage new growth and reduce the crop. |
| CataloniaSpain | -1.2°C | -274 GDD | +147 mm | Cool weather can slow ripening and help grapes retain acidity. Frequent rain can mean more canopy growth and more disease pressure. |
| RiojaSpain | -1.2°C | -242 GDD | +158 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. |
| PiedmontItaly | -1.3°C | -251 GDD | +241 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. |
| MarlboroughNew Zealand | -1.3°C | -261 GDD | +184 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. |
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.