On Sun, 13 Aug 2017 06:24:11 -0700 (PDT), wrote:

I've been looking for a grill cover that lasts more than a season too. I just had a goofy thought. It's the UV that breaks down the cover right? I was thinking of spraying sunblock on the cover. Anybody else thinks that will work? You can even get the water resistant kind too so it doesn't immediately run off in the rain.

You don't need a cover for a Weber. My charcoal one has been sitting outside for 20 years.
The gas fired one for 3 years. Neither ever saw a cover.