it's "really cold" if you're from southern california and "beach weather" if you're from a lot of the rest of the world
And even if you're a transplant (at least with me) that's used to cold winters, you've got 1-2 years before you normalize to the weather. First year here I really believed there was no winter in LA, but after you acclimate you realize it was all a lie!
I'm sorry what? Only if they were measuring in kelvin does that qualify as "cold" let alone "really cold".