Water your lawn only when it needs watering
A good way to see if your lawn needs watering is to step on the grass. If it springs up when you move, it does not need water. If it stays flat, then the lawn is ready for watering. Allowing the grass to grow taller to about 3inches will promote water retention in the soil. Most lawns need about 1inch of water each week. During the dry spells, you can stop watering altogether and the lawn will go brown and dormant. Once cooler weather arrives, the morning dew and rainfall will bring the lawn back to its usual vigor.