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 In this photo taken Friday, July 26, 2013, veraison, the onset of ripening, is shown on Cabernet Sauvignon grapes at the Opus One winery in Oakville, Calif. One thing that is certain about the weather in Californiaís premiere wine grape-growing region is that there is no such thing as normal, and 2013 is living up to that adage. After dealing with cool temperatures in three of the past four years that slowed ripening and kept grapes hanging on the vine until the fall rainy season threated, growers in Napa Valley are dealing with an opposite challenge. (AP Photo/Eric Risberg) Eric Risberg/AP