Motorhome Air Conditioner

I'm unsure what the temperature was inside the motorhome today.  But I'm in a gravel pit, oil & gas campsite in Far SE Ohio.  There aren't any trees around it, so it's constantly exposed to the sun.  The outdoor temperature today was about 91°F and the UV index was very high at 8 out of 11+.  Under these conditions, the air conditioner wasn't really keeping up.  I applied antiperspirant and still my arm pits were sweating.  When the outdoor temperature dropped to 88°F, the motorhome became more comfortable.