There is an upper low off the California coastline with a surface trough right over the Central Coast. This means there is cold air aloft and some rising motion in the air. That is producing the showers and isolated thunderstorms with scattered hail. This is energized by daytime heating. We lose that this evening and the weather features causing this move out of the area Friday.
Saturday there might be enough cold air at high elevations for some isolated activity in the high country but I doubt most major communities see anything. Sunday another trough swings through the area. This could bring a few light showers through the area, but amounts look very minor and most people likely don't see showers.
With these disturbances the temps have been on the cool side on the 50s and lower 60s. Some minor improvement through the weekend but a big temperature jump on Monday with 70s returning for many. That will be the big change most folks notice. Keeping an eye on a potential cooler sytem late next week, could be a shower chance producer but a little too early to spend much time on this.