Yea black interior is quite hot in the sunmer. My daily and my wifes daily both have black interior as well. it burns the crap out of the back of your legs when you sit down if you're lucky!
I hate a black interior, my Duster has a white interior, way cooler.
My wife has a CJ-5 for a toy, that sob has black seats, most of the time no top on it and it will fry you.