
I have seen my fellow Southern California residents go running for parkas and winter wear when it drops to an arctic 60 or 65 degrees degrees!

I am not one of them, however. I am more in line with your way of thinking -- anything in the 60s is still warn enough to get away with t-shirts, shorts, and warm weather wear or whatever, and 70 degrees means it's time for a fan or some sort of A/C. I wish it were 60 degrees every day during summer, and not this infernal cauldron of death that we are currently experiencing.
The only area where we differ is that you will wait until the teens and snow to pull out the winter wear, whereas I will wait until the weather drops down to 40 degrees to put on a coat, and 30 degrees to put on the gloves and neck scarves!