Certified Sommelier Practice Exam 2026 - Free Certified Sommelier Practice Questions and Study Guide

Eden Valley and Adelaide Hills are well-known for their high altitudes, which contribute to cooler evening temperatures. These cooler temperatures are crucial in maintaining acidity in grapes, allowing for a balanced and more complex flavor profile in the wines produced in these regions.

Eden Valley, situated adjacent to the Barossa Valley but at a higher elevation, experiences significant temperature drops at night. This diurnal temperature variation helps preserve the freshness and acidity of the wine. The Adelaide Hills, similarly elevated, features a cooler climate compared to other regions in South Australia, also benefiting from the altitude to produce high-quality wines, particularly Chardonnay and Pinot Noir.

In contrast, the other regions listed do not share the same level of elevation-related cooling effects. Barossa Valley, for instance, is known for its warmer climate, particularly suited for robust red wines. Coonawarra, while it has a notable terroir, does not emphasize altitude as a defining aspect. McLaren Vale and Riverland are generally warmer regions, and Clare Valley, while known for its cooler climate, does not reach the altitudes of Eden Valley and Adelaide Hills, making the latter pair the correct choice concerning cool evening temperatures induced by elevation.