not an expert but we’ve had a lot of rain in the NE and our lawn looks worse than yours. i was told by my neighbor that it could be fungus from all the rain and humidity. a lot of lawns in this area look similar. I’m looking into how to treat

Temps in the low 80's should not need that much water. Here in N. TX it has been in the mid 90's & I water every 3 days & I have sandy soil. I would try every 5 -6 days.

You are overwatering by a lot. I live in the northern part of south central Texas and, unless it rains, I deep-water once every 10-14 days in the heat of summer. Since we had so much rain this spring I did not start watering until July. Since then I've watered a handful of times.

But lets talk about your area. Here is a picture of a neighborhood of Kentucky bluegrass lawns in Eastern Pennsylvania.

Every lawn but one was watered every day. The green lawn was deep watered once a week. Thanks to morpheuspa for posting this pic back in 2010.

Deep watering on an infrequent basis is not a secret. The garden books from the 50s have all the information. Deep means 1 inch every time you water. If you get rain, include the rain in the 1 inch and adjust your frequency calendar. The meaning of infrequent is the hard part. There are many factors bearing on the issue including temperature, humidity, cloudiness, wind, soil type, grass type, grass mowing height, and some other. Still I have tried to quantify it. The main factor is the daily high temperature with humidity a close second. If the temps are below 70, water once a month. If the temps are in the 70s, water once every 3 weeks. With temps in the 80s water once every 2 weeks. With temps in the 90s water every week. With temps in the low 100s water every 5 days. With temps above 110 water every 3-4 days. This seems to work very well in the south. People trying it in the north have more trouble, although the picture above demonstrates that once per week is enough.