What is an essential aspect of Mendoza's climate for viticulture?

Mendoza's climate is characterized by low humidity levels, which is essential for viticulture in the region. This low humidity helps to reduce the incidence of vine diseases, particularly fungal infections such as powdery mildew and botrytis. Such diseases thrive in more humid conditions, so the dry climate of Mendoza creates a healthier environment for grape growing.

Additionally, the area is located in a rain shadow, meaning it receives very little rainfall, which further contributes to the low humidity. The combination of consistent sun exposure and low moisture is ideal for ripening grapes, allowing for the development of concentrated flavors and sugars, which are critical for producing high-quality wines. This low humidity also aids in creating a diurnal temperature variation, where warm days are followed by cooler nights, resulting in balanced acidity and fruit expression in the wine.