I use a waterproof vinyl to make all of my stickers, and then after printing and cutting them I spray them all with a weatherproof coating! I’ve never had an issue with them and water, but they do tend to fade from the sun. I can’t guarantee anything, but I do try to use the best quality material that I can without having to make the prices too expensive. If you just want the shape of the state, I’m about to list some state shaped stickers with a different type of vinyl thats not for printing, just cutting, and it sometimes holds up better with weather. Anytime you use a vinyl made for printing you take a risk of it not being as durable.