So How's the Weather, Writers?

We don't think about the weather much usually, it just is, unless it's doing something particularly violent. In fact we don't think about it to the extent that we may not put any of it in a book we're writing.  How many times have you read a book and not even noted the weather? 
Now you say, it's not important really, and in the end, literally, that's probably true, but it can add a very powerful element to your writing, provide sensory texture and contribute to the mood you're creating in a...