I don't recommend installing a different rated thermostat!
Your engine is designed to run the best and most efficiently with the existing thermostat rating.
I have spent some time in your beautiful state, and have visited several times most of your Islands. Your temperatures should not be causing your coolant to ever go past the center mark on your gauge. If it does, then I would have it checked out, because it should not be doing that.
Make sure that your overflow bottle has coolant in it, and that you have a good radiator cap. Several have had defective radiator caps, that will not draw the coolant back into the radiator when cooling down.
Make sure that you keep the bugs washed out externally, because that will reduce your air flow through your core.
Did you remove your Air Dam, because that seems to be a cause for reduced cooling? Several on the Forum have reported a reduction in cooling when doing this, in warm climates.
I live in Phoenix, and my 2013 Wrangler has seen ambient temperatures in traffic of 115 plus, and I drive it in our mountains with temps mid-summer in the 90s, and mine never goes past the center mark. (That includes off road usage in mid-summer). I also run with a couple of 2012s and another 2013 and only one of them ever has had any heating issues, and his just had air in the system that needed to be bleed out.
So good luck with your Wrangler, and enjoy your Beautiful State..........