Actually, capri's aren't that hot. I have a couple pair made of a REALLY light fabric that I love wearing. I wouldn't wear demin ones in the summer though - way too stiff and hot. I find that most demin is not that comfy in the summer, esp shorts. They are too stiff and heavy.
Sundresses are the most comfy - but I have trouble finding ones I like. The ones that fit my boobs are too big everywhere else.
Like NYC, I have shorter legs, so when I wear longer shorts, they look stumpy. So I always wear shorter shorts, but it does suck being sweaty and having your butt and hamstrings sticking to chairs. Being sweaty in shorts feels worse than being sweaty in skirts and capri's. Seriously.
And now, being PG, that is entering a whole 'nother realm of clothes confusion. I have found a few maternity dress and capri's I want to buy that I will wear later this summer and into fall. There are basically NO shorts I like. Living in Vegas means I wear summer clothes pretty much year round, lol.
And thongs ARE more comfortable to me.

To each their own!