Best place to go enjoy the sunshine this weekend, outside of SF?

It’s been cold and foggy and generally un-summer-like in San Franicisco the past couple of weeks (as it usually is in July/August…but somehow this year just seems worse!). I really want to get outside of the city and go somewhere sunny and beautiful this weekend. Where to go? Napa? Tahoe? Big Sur?
What are some favorite getaway ideas, either for camping/hiking or just general frolicking, where I can see the sunshine and have a warm relaxing summer weekend?