Welcome to the Forum, JR...
We have seen every weather norm burst in front of our eyes in the last five years of full timing. We've seen rain in the desert and snow on the beach and every other goofy thing in between. There are no strict guarantees anymore. Just when you think you have it figured out, it will make a liar out of everyone.
The fact that you have wheels under you is helpful, but trying to long term plan for weather is a fool's errand.
We make our plans with the best information available at the time and then adjust on the road if need be. Certainly there are occasions where you need to pick up and go, but one of the full time advantages is, you can always remold your Jello plans. Just be prepared to execute Plan B and go with the flow and you will still have an amazing journey regardless.
As my drill sergeant used to say "adapt, improvise, and overcome".
We love our lifestyle regardless of the burps in the weather.
Kim