This is definitely the best for San Diego too. 50-60 in the morning usually, 60-80 in the evening. I can most of the time get by with just short sleeves.

In the summer it's great in the morning (short sleeves every day) but 80-100 in the evening. In the winter it's multiple layers in the morning (it can get frosty around dawn), and maybe T+1 layer in the evening.