Depends where we go...Negro Bill Canyon is shaded and has a perennial stream running through it, so it wasn't a problem (not to mention it was pretty cool weather last year). Some of the other trails can get much hotter I am sure.
Nice thing about Portal is the ponds for the dogs to jump in after the trails.
Although I have been considering leaving Cinder at home this year, too. I do worry about a black dog in the desert...