4am is technically “before sunset”, but I assume you meant “before sunrise”.
I used to live in central Florida (so not even the benefit of the ocean climate) and I rode my bike everywhere and I lived in a house with no AC. I was young and high all the time, which I guess made being soaked in sweat and stinky all the time bearable. Somehow I still got play from women - apparently I was cute back then and I was hyper-fit, at least. Absolutely no fucking way I could stand that shit now.