The Climate of Diamond Mountain
Diamond Mountain Climate Suited for Cabernet Sauvignon Production
Located in the sheltered northwestern hills of the Napa Valley AVA, the climate of the Diamond Mountain wine region is very warm. Cabernet Sauvignon, Merlot, Cabernet Franc, and Zinfandel are able to fully ripen on the mountain’s sunny hillside slopes.
At the same time, maritime breezes and occasional fog cools evening temperatures considerably. These conflicting climatic factors are the key to Diamond Mountain’s success. Most vines are planted on slopes that face east. These properties get a lot of early morning sun, but also afternoon shade. Temperatures cool slowly as the sun goes down, giving grapes a desirable blend of ripeness and acidity.
There are some cool microclimates in the Diamond Mountain AVA. Some vineyards are grown on northeast facing slopes and are partially shaded during the morning. A bit of Chardonnay is grown in these areas.
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