Generally, lawns need watering only every five to seven days in summer and every 10 to 14 days in winter. When grass blades begin to fold in half lengthwise, or fail to spring back up when stepped upon, or turn a grayish color, it is time to water. Water lawns deeply, but less frequently. Put about one inch of water on the lawn each time you irrigate. More water is wasteful and less water does not promote deep root growth.
Some types just keep the sprinklers from operating in the rain.
Others actually monitor soil moisture content and allow the system to water only when needed. They include reducing grass areas, grouping plants by similar water needs, mulching, efficient irrigation, and using drought-resistant native plants. Use sprinklers that are most water-efficient for each application. Micro and drip irrigation and soaker hoses are examples of water efficient methods of irrigation. Check sprinkler systems and timing devices.