UA Cooperative Extension publishes a month-by-month irrigation total for non-overseeded bermudagrass in the low elevation Arizona desert. Read the footnote before you use the numbers.
The published figures
| Month | Inches per month |
|---|---|
| March | 3.4 |
| April | 5.2 |
| May | 6.3 |
| June | 6.4 |
| July | 6.7 |
| August | 6.4 |
| September | 4.8 |
| October | 3.6 |
The footnote matters
az1817 states these totals are based on AZMET data for the Phoenix area. Tucson sits at a higher elevation than Phoenix, which is why the same publication gives Tucson a different overseeding window. Treat the table as the shape of the year – low in March, peaking in July, falling away through October – rather than as a Tucson meter reading.
Frequency, not just volume
Deep and infrequent irrigation every three days, rather than multiple short cycles every day, is what encourages good root development. Volume delivered badly still produces a shallow-rooted lawn.
Who governs
Whatever a maintenance guide says, current watering rules and conservation requirements for Tucson are published by Tucson Water, and they control. Confirm them directly before setting a controller.
Sources
University of Arizona Cooperative Extension az1817, A Turfgrass Maintenance Guide for Residential and Commercial Lawns in the Low Elevation Arizona Desert (Kai Umeda, April 2020), read 2026-08-04. Current watering rules and conservation requirements are published by Tucson Water; confirm them directly before work begins.
Question 1 for property planning is how guide will be verified on this property. Leave the answer open until the applicable measurement, inspection, or owner selection is recorded in the scope.
Choose the Next Step for Your Sonoran Yard
Describe the site's sun, drainage, irrigation, and the way you want to use the space. Tucson Yard Works can review that context and prepare an estimate for a defined project.