There is no "off season" for wine! Somewhere along the cycle of life the vine is moving forward, ready to create the next batch of fermented fruit.
In the spirit of why fight it, people learned to just let the fruit freeze right on the vine. And lo and behold, ice wine.
In Southern Oregon this would be a fantasy. Too warm. Here you are likely to find Late Harvest instead. Really the same idea; less water, more sugar equals sweat.