Garden Water Calculator

Do you need to water your lawn or garden?


Established lawns and shrubs and most vegetables and flowers need just one inch of water a week. If there has been an inch of rainfall during the week, you don't need to water at all. How can you tell if your yard has received an inch of water?

The calculator below determines how much water you lawn or garden needs based on the rainfall recorded in your area over the last seven days.

Directions: Select a rainfall collection site nearest to your neighborhood then click the submit button to see the amount of additional watering needed in inches (if any).

For more information, go to the MWRAs Gardening and Landscaping page.

Rainfall Collection Sites

Rainfall to date since 4/13/2021 is:


No watering needed this week.
rainfall collection site

Rainfall Collection Site