I live in the Sierra Nevadas. Above the snow line and we still get hot summers. Windy all year.
I've had 3 ADCO covers. Never had one make it a full 12 months. And I've never been able to get any of them replaced by ADCO. One dealer gave me my money back when he got off the phone with ADCO on my behalf. Said he is going to stop dealing with them due to crappy customer service. That's just one guy, I'm just one guy, but THREE covers??? I'm done with them. Can't find another one I think will be any better though. It's just rough weather up here I guess.