I sweat a LOT. I'm half Sicilian, I even sweat in the shower, lol. I'm a big believer in Endurolytes during the summer months. Hydration is a constant struggle for me during the hot months even when I'm not particularly active. But, like I said, I'm on the road in the early morning hours now for the most part. I'm not ancient quite yet, but I'm old enough that I've had to make some adjustments.
77 sounds pretty nice. We had a streak in late June for about two weeks that our morning lows were in the 60's. It was unbelievable. This time of year, those days are golden.