Yep, you live in a true Mediterranean climate, the original region to carry the name, California has a true Mediterranean climate as well(as well as the wine growing regions of Australia, Chile, South Africa and the rest of the Mediterranean basin).Holy fuck! The same here in the south of italy.
A really cold winter with no rain/snow and then lot of rain in april and may.
Just yesterday we had a hailstorm and now it seems it's all ended (but it fucked up two plants.. and I couldn't check all of them).
And now, it will be a dry and hot summer.
My climate is called a cool Mediterranean climate, cooler in winter and summer than Italy or the California valleys, but sharing the tendency to get over 90% of all rainfall in the winter months, with winters that are normally very mild temperature wise compared to the rest of America at my latitude, the snow we did get this winter was way out of norm. My summers are normally very dry, very sunny, and warm/hot.
When we don't get enough rainfall in December, January, and February, we are basically screwed because it won't fall in large enough amounts any other part of the year to catch us up. Many folks not familiar with Mediterranean climates would classify my Summer as a drought, but since its normal to be dry that time of year, I just call it summer. The drought this year actually started right around Christmas.