IME it is very dry there for a good part of the year, I've only been there in June and July but I've never seen more than a few clouds in the sky and temps over 80*. As with most of the Pacific coast the days start out grey but it's low level fog that burns off by ~10am, that's why it's so lush from about Santa Barbara north into Canada and the Redwoods are able to grow to such staggering heights even though it's so dry for so many months.