I'm near the Great Lakes, high humidity and high temps.
That link looks like the new wicking fabric tech that's been around a few years. Simply astonishing how well it works even in a humid climate. I no longer fear those days. They still suck, but I don't dread them.
I have been wearing black long sleeve shirts for many years here in the deep South.
Post Today 5:44:20 AM Subject: Clothing suggestions for hot humid sunny weather outdoor work
I'm in Djibouti right now. I'd recommend khaki pants, light cotton longsleeve shirt, bandana or a shemagh. Sandals if appropriate, low top slip ons like Keens if you have to go steel toe. How much of SW Asia and Africa are sporting sandals? Pretty big majority.
I'm in the bush right now, and my Internet isn't good enough to upload video. But when I go to the capital in a month or so I'll try to remember to record a video to show how I tie a work turban.