A couple of sources that I've read give a reminder about watering to keep your trees healthy during dry times in summer. Trees need enough moisture to prevent drought stress, otherwise they are more vulnerable to disease, insect problems or death.
A regular sprinkler does not water a tree efficiently and wastes a lot of water. Use a soaker hose instead. Start with a wrap around the trunk, working outward in circles towards the edge of the tree canopy (otherwise known as the drip line). Give the tree a good soak for about 2 hours per week in weeks when there is no rain. The soaker hose will let the water go just where it's needed, without a lot of evaporation or runoff to the street. Your tree will stay healthier.