My experience is that it is not your weather, it is your tires. Standard 15 inch trailer tires are JUNK. I converted my last trailer to 16 inch, 10 ply light truck tires and never looked back, two years parked outside and no problems. Tire shop got me a size that was only 1/2 inch taller than my regular 15 tires, so all I had to do was buy rims.
With 15 inch trailer tires I used to blow out on average at least two a summer. Had damage to trailer, and changing trailer tires on the interstate is much more dangerous than drag racing.
Bought a new trailer this year and 16 inch tires were an option, so I got them on it as well.