I have Centipede grass, and live in South Carolina. Most people here don’t water their grass in the winter because it’s dormant. But the agricultural extension says you /should/ water it during long dry and warmer periods. That was what I was trying to do.
Problem is that Rachio’s Flex Daily always waters the same amount. So if you need very little water, which we do at this time, it will water the heck out of the grass, then not water for a week or two. I personally don’t like this.
I’d suggested to them some time ago we have a Flex Daily version, which I called Cruise Control, which still uses all the factors and graphs of Flex Daily, but you tell it how often to water, and it varies the amount of water applied. So watering in the winter, once a week, would apply just a little water, which I think is great. Instead of drowning it, then waiting weeks. This would work as well in summer, better IMHO.
I think that Flex Daily’s formulas, with the inputs of soil type, root depth, allowed depletion, crop coefficient, etc. takes into account the properties of the grass during the growing season, and the water evaporation/use due to weather, but not the fact that the grass might be dormant, and not really require that much.