The wine region of San Juan sits in the north-western corner of Argentina, between Mendoza and La Rioja, and is almost entirely contained within the mountainous foothills of the Andes.
In terms of production, San Juan is Argentina's second-largest wine region (after Mendoza), with about half of its agricultural land devoted to vineyards. Key areas include the Tulum Valley, the Zonda Valley and the high-quality Pedernal Valley.
San Juan region is predominantly semi-desert (with just 10cm of average rainfall per year) and its viticulture is dependent on irrigation from the San Juan and Jachal rivers as well as meltwater flowing down from the Andes mountain range to the west. San Juan also has no more than 30 days of cloud covered days per year and nights are cold while days are hot. This range in temperature is ideal for the cultivation of grapes high in polyphenols and wines with intense flavour and fruit.
San Juan's vineyards are located at a relatively high average altitude, with the lowest at around 610 MASL and the highest at 1200 MASL and cover some 45,000 hectares
San Juan is home to a broad range of grapes but its Syrah deserves special mention and is attracting increasing attention worldwide.
Additionally, the region produces sherry-style wines and provides most of the base for Argentina's brandy and vermouth.
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Without doubt the most important province in Argentinian wine production, accounting for around 75 percent of the total vineyards in Argentina. The highest peaks of the Andes are found in Mendoza, with Aconcagua sitting at around 6960 MASL. The presence of the Andes, which acts as a barrier to the humid winds of the Pacific, help shape the climate, generating ideal conditions for the cultivation of vines.