I'm in your general area. I needed to fill yesterday, but I was waiting for the same rain you didn't get! As of right now, my weather app is saying 100% rain chance for Saturday. I hear ya' - my overflow drain has been used more than my fill line. If I know rain is headed our way, I let the level get lower as long as my skimmers are happy. Tomorrow I may add a little but not up to the mid point of my skimmers. Then it's wait and see what happens on Saturday. But I agree, I can pretty much guarantee rain, if I top off the pool!