Joe - I've found that my KBG in full sun is sensitive to heat stress. I know Dennis recommends watering once a week when in the 90s, but he lives in the south with warm season grasses. My soil is sandy, but not unusually so. I don't live near the beach or a quarry or anything like that. Like everybody, I originally thought I had clay soil until I did the jar test. Anyway, my conclusion after 5 or 6 years of this is that you need to water very frequently when it gets that hot or else stress sets in quickly. I'm not sure if it is daily or every other day, but certainly not weekly. My plan this year is to water a little every day or other day as long as it is heat wave conditions and see what happens. I'm not going to worry about one day being hot if temps return to normal the next day. I'm also resigned to the idea of needing a fungicide every year. I learned that KBG sod becomes susceptible to fungus only after its third season of being laid down, oddly. Sure enough, in my fourth season I started getting hammered by fungus.

Keep us posted.

daniel-

every other day for how long? and at what temps? and what time of day?

I thought this was a cardinal sin lol.....

We had quite a bit of rain last night, and according to the hourly forecast it'll be mid 80's this afternoon but mostly cloudy with humidity under 50%.

No need to water I guess. Will keep an eye on it.

With 6 inches of water in one month, you might look for signs of disease, but definitely don't water. One of the problems with getting so much water, besides the added pathogenic fungal pressure, is that the roots don't need to go deep to find moisture. Deep roots are good - shallow roots make it harder to go more than a few days without watering.

Per my water gauge, I received 1.2" of rainfall yesterday evening. Official was 0.95". Either one is enough that I won't be watering this week even with two days in the mid-eighties. :-)

I go probably 10 days in the mid 80s on an inch of water.