Frosty morning

We don't get cold weather in Florida often. Being a Florida native, when we do, I don't particularly like it. We are in the midst of a week of what for us is cold weather. When this happens, sometimes we see things that we are not used to seeing. If you look closely, there is frost on the brown roofs of the houses. We like to call this "Florida snow". No shoveling involved, and it is gone by the time the sun is fully up. When we see this it also means the weather is in the 30's - brrrr.... Is it summer yet?