Here's my annual, yes it does get cold enough to frost in No. California. I have no pics of the local mountain, but there is usually snow up there right about now. This was yesterday--then by early afternoon, when we went into San Francisco, gorgeous weather. Mid 50s, sunny, bright blue sky.
That's the Conservatory of Flowers in Golden Gate park, which looks just like Kew Gardens outside London.
There was a display of miniature trains--
Today, it is much colder, rainy and gray. But, hey, we're all going to Star Wars. YAY