A perfect summer's day would be 80 to 82 deg. with a very light breeze. I would be outside on my own property enjoying my dogs and maybe attempting a bit of gardening. We have AC so I can go inside if it gets too hot.
And of course the topper of the day would be barbecuing something for dinner.
Here in the Philippines summer means rain and lots of it and temps are cooler than spring, which is the hottest. Mid March through May are the scorchers with April being the hottest. But when it is hot we like to ride the motorcycle to the beach or down the coast. Or if it is too hot for a long ride we go to the local waterfall to picnic. Of course a cold beer it good almost anytime since we don't do cold weather here.
The beach. After leaving Florida, I really miss palm trees, white sand, blue and green waters, etc. Just grab a six pack of Redd's, the Kindle, a bag with change of clothes, lay down on the towel and enjoy the day.