Summer heat can really stress Lawns and Landscapes. But you don’t need to water every day. Lawns require 1/2” to 1” per week through either rainfall or irrigation. Landscape plantings and trees will do well with just on good soaking per week. Annuals may require a little more.
A Helpful Link: http://aggie-horticulture.tamu.edu/extension/homelandscape/water/water.html