Truth be told, I hate to drink water........always have. But beginning in the spring, when the temperatures begin to creep above 80F, I will begin drinking water. I guess I average 2-3 glasses/day in April/May, and 3-4 glasses beginning in June. By July, with temperatures mostly in the 90's, I have added Gatorade, usually alternating that and water. Thru August, that total is more like 6 glasses. I always drink a full glass of (refrigerated) unsweetened tea for lunch, every single day.
I am better at hydrating myself the hotter the temperature is. I have even started wearing a floppy hat, and other than the occasional baseball cap, I never wore a hat. If I "forget", my wife is usually out on the porch "reminding" me to put it on.
I have 12-20 places frozen by my dermatologist every six months and this has been constant for the last five or so years. I think these actinic lesions are due more to my tens of thousands of hours spent out in the sun, with no shirt, no shoes, no sunscreen, and no hat. Just shorts. I will pay for those sun-loving days the rest of my life.