I use and ONLY ride now days EVEN when HOT in AZ.... CarHarts Double legged front pants... YES they are Heavy but I stay DRY, Always.. And No Need for leather..
The cotton is the KEY and Wicking material that will breath is a MUST..
ALSO see that your SHORT pants are ALL cotton... Polly-esters will SWEAT regardless if a blend or Not.
I only wear ALL COTTON shirts and double front pants and refrain from my leather Chaps.. Even My leather vest is too much in Az. hot heat.
signed....BUBBIE