The Maipo Valley has a Mediterranean climate, with few rains (mainly concentrated in winter) followed by a hot summer which is very suitable for the proper ripening of the grapes.
The temperature variation also presents some differences according to the location; for example, the upper Maipo areas are hotter and winds coming from the Andes Mountains play a role in the slow ripening of the grapes, so wines normally develop more structure, concentration and firmer tannins. On the other hand, in the lower Maipo areas, the temperature is mild, so in the case of red wines, they are more fruity and smooth with softer tannins. The soils are usually of alluvial origin, and have good porosity and drainage. (Cabernet Sauvignon Gran Reserva and Gran Bosque Private Reserve)
The Mediterranean climate offers more humid and windy conditions.
The plantations are mostly between 600 and 1000 meters above river banks. Diverse micro-climates provide for the cultivation of different varietals. The Rapel Valley is foremost a red wine region. (Carmenere Reserva y Cabernet Sauvignon Reserva).
The proliferation of different microclimates allows the cultivation of a variety of vines. In the Rapel Valley, red varietals dominate. (Reserva Carmenere and Cabernet Sauvignon Reserve)