Vintage weather atlas
2021 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 | +1.2°C | +248 GDD | -114 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. |
| Yakima & Central Columbia BasinUnited States | +1.1°C | +235 GDD | -63 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. |
| Columbia GorgeUnited States | +1.0°C | +183 GDD | -111 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. |
| Southern OregonUnited States | +0.8°C | +148 GDD | -68 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. |
| Willamette ValleyUnited States | +0.7°C | +175 GDD | -129 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. Rain close to harvest can raise rot pressure and shorten the picking window. |
| SardiniaItaly | +0.7°C | +190 GDD | -56 mm | Repeated hot days can speed ripening and put vines under stress. Frost exposure can vary sharply from one site to the next. |
| MarlboroughNew Zealand | +0.7°C | +148 GDD | +136 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| EtnaItaly | +0.6°C | +142 GDD | +263 mm | Repeated hot days can speed ripening and put vines under stress. Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. |
| CoonawarraAustralia | +0.4°C | +104 GDD | -88 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| CorsicaFrance | +0.4°C | +118 GDD | -97 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. |
| PiedmontItaly | +0.4°C | +84 GDD | -172 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. |
| TasmaniaAustralia | +0.4°C | +48 GDD | -34 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| MendozaArgentina | +0.4°C | +53 GDD | -178 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 | +0.3°C | +66 GDD | -80 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Central SicilyItaly | +0.3°C | +81 GDD | +68 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Napa ValleyUnited States | +0.3°C | +65 GDD | +90 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| PugliaItaly | +0.2°C | +68 GDD | -72 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. |
| AbruzzoItaly | +0.2°C | +114 GDD | -224 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. |
| Jerez & SherrySpain | +0.2°C | +54 GDD | -133 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| Yarra Valley & Mornington PeninsulaAustralia | +0.2°C | +58 GDD | +57 mm | No single weather pattern stands out in the regional record. |
| LodiUnited States | +0.2°C | +54 GDD | +34 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. |
| Southern ApenninesItaly | +0.2°C | +94 GDD | -85 mm | Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. |
| TuscanyItaly | +0.2°C | +46 GDD | -152 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. |
| Umbria & MarcheItaly | +0.1°C | +71 GDD | -133 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 | +0.1°C | +35 GDD | +137 mm | Repeated hot days can speed ripening and put vines under stress. Frequent rain can mean more canopy growth and more disease pressure. |
| RiojaSpain | +0.1°C | +14 GDD | +4 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Santa Cruz MountainsUnited States | +0.1°C | +17 GDD | +47 mm | Rain close to harvest can raise rot pressure and shorten the picking window. |
| Paso Robles & Santa Barbara CountyUnited States | +0.1°C | +19 GDD | -56 mm | No single weather pattern stands out in the regional record. |
| Heathcote & RutherglenAustralia | +0.1°C | +3 GDD | +134 mm | Frequent rain can mean more canopy growth and more disease pressure. |
| Castilla y LeónSpain | +0.0°C | -19 GDD | +21 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Languedoc, Roussillon & ProvenceFrance | +0.0°C | +11 GDD | -56 mm | Frost exposure can vary sharply from one site to the next. |
| Maipo ValleyChile | -0.1°C | -21 GDD | -56 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| StellenboschSouth Africa | -0.1°C | -22 GDD | -46 mm | No single weather pattern stands out in the regional record. |
| McLaren ValeAustralia | -0.1°C | -30 GDD | -49 mm | No single weather pattern stands out in the regional record. |
| Bierzo & ValdeorrasSpain | -0.1°C | -84 GDD | -19 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Adelaide HillsAustralia | -0.1°C | -39 GDD | -41 mm | No single weather pattern stands out in the regional record. |
| Po Valley & Northeast ItalyItaly | -0.1°C | -12 GDD | -123 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. |
| DouroPortugal | -0.2°C | -65 GDD | -11 mm | No single weather pattern stands out in the regional record. |
| Loire ValleyFrance | -0.2°C | -26 GDD | +33 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Trentino–Alto AdigeItaly | -0.2°C | -10 GDD | -59 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| Rías BaixasSpain | -0.2°C | -55 GDD | -68 mm | No single weather pattern stands out in the regional record. |
| WachauAustria | -0.2°C | -15 GDD | -76 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. |
| Barossa, Eden & Clare ValleysAustralia | -0.3°C | -67 GDD | -23 mm | No single weather pattern stands out in the regional record. |
| Rhône ValleyFrance | -0.3°C | -65 GDD | +64 mm | Frost exposure can vary sharply from one site to the next. |
| Hunter ValleyAustralia | -0.4°C | -90 GDD | +369 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. |
| Margaret River & Great SouthernAustralia | -0.4°C | -89 GDD | +4 mm | No single weather pattern stands out in the regional record. |
| ChampagneFrance | -0.4°C | -55 GDD | +126 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| BordeauxFrance | -0.4°C | -88 GDD | +13 mm | Frost exposure can vary sharply from one site to the next. |
| Sonoma & MendocinoUnited States | -0.5°C | -99 GDD | +103 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. |
| Alsace & JuraFrance | -0.6°C | -106 GDD | +76 mm | A freeze after budbreak can damage new growth and reduce the crop. |
| BurgundyFrance | -0.7°C | -119 GDD | +108 mm | Frequent rain can mean more canopy growth and more disease pressure. A freeze after budbreak can damage new growth and reduce the crop. |
| MoselGermany | -0.8°C | -100 GDD | +111 mm | Frequent rain can mean more canopy growth and more disease pressure. 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.