i was in the same situation. hot - 90s - 100s - and dry day hikes w/not much cover. during my research i found these and liked them enough to buy them. on sale on line - you just gotta watch the sales.

patagonia gII pants - shorts and zip offs - for several years now. are lightweight, cool, dry fast when wet, no signs of wear yet. pricey but have worn exceptionally well.

zip offs: zip offs shorts: shorts

for shirts: railriders, long sleeves: eco mesh they have no buttons and dry fast. or explorer (santa brought this one): explorer

when i wear out the railriders - maybe in the next century - i will buy one of these: sunday afternoons

they also have geeky looking hats that have a 4" brim and will replace my columbia w/flap when it goes.

good luck!