Over watering your lawn causes more damage than lack of water. That’s
because most turf grasses can handle dry spells, but definitely not flooding. Most grasses require 1 – 1.5″ of water per week. This is enough water to moisten the soil to 4 – 6″ below the surface for clay soils and 8 – 10″ for sandy soils. Don’t guess at how much water your lawn is getting. For measuring Mother Nature’s contribution, invest in a rain gauge.
If at the end of the week she’s contributed enough, hold off adding more. If she comes up short, you’ll want to add some supplemental watering. Again, measure how much water your sprinkler is putting down. You’ll have to follow local regulations when there are watering bans, but just remember that less water is acceptable and grass is a very resilient plant. When the rains do return your lawn will come back with a little encouragement on your part.