Here's a quick comment. There are quite a few A/C threads and experienced people so you should get some answers.

I was driving out of Sacramento last week, heading towards the bay.

The outside temp read 91. The A/C was on max. It's worked well since I've had it. The car could not get cool enough.

I kept driving. Hit Vacaville. Temp still read 91. Car was very comfortable.

It's not just the ambient temp but radiant from sun and probably humidity that affect life inside the coach.

If I lived in a high radiant environment I'd look into a quality tint for my car.

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