Having a nice lawn in July and Aug starts with taking proper care of it in spring. From someone who knows what they are doing.
It took me awhile, when I had a lawn service, to realize that not everyone wants to have a nice-looking lawn. Some people are happy with anything green growing, as long as it is cut short, and they don't have to spend much time or money on upkeep. Others enjoy thick soft grass, but don't like to mow it. And still others want the perfect lawn, with thick grass, low numbers of weeds, and regular mowing. Some people could not care less if there is anything green growing in their yard, and would prefer to never have to mow anything throughout the entire growing season. Everyone's home is their own castle, and they have to right to have the kind of yard they like.
We like to have thick soft grass, with low numbers of weeds. It feels really nice to walk on, barefoot. It looks real nice. We mow in straight lines, so it looks great freshly mowed, too. It costs money, and takes work to keep it nice. The one thing we've never done, is have an in-ground sprinkler system installed. But we've discussed it a lot, lol.