Here in the foothills, north of LA, we get colder winter nights than you - some good frosts in winter, even a dusting of snow last winter. That is at 1800 feet, just under 300 meters. But there are so many microclimates between the valleys, the hills, the coastline, the mountains it is ridiculous. The valleys get hot, hot, hot in summer, closer to the coast is milder. Often cooler during the day, but never the frosts in winter. I think it is probably drier here. Perhaps some of the coastal areas of southern california would be closest. As you get north, it is much less sunny and more rain (those two tend to go together

) along the coasts. Inland, it is drier, with more extremes of temperatures.