Sprinkler Winterization in Arizona
In Arizona, local sprinklers deadlines run from Sep 29 to Dec 25, with a median around Dec 12 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.
Notable cities
- Flagstaff — earliest deadline in the state
- Buckeye — latest deadline in the state
- Casa Grande — near the state median
All Arizona cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Flagstaff | Sep 29 | Oct 9 | View → | Checklist |
| Prescott | Oct 21 | Oct 31 | View → | Checklist |
| Prescott Valley | Oct 29 | Nov 8 | View → | Checklist |
| Sierra Vista | Nov 11 | Nov 21 | View → | Checklist |
| Oro Valley | Nov 11 | Nov 21 | View → | Checklist |
| Maricopa | Nov 26 | Dec 6 | View → | Checklist |
| Mesa | Dec 9 | Dec 19 | View → | Checklist |
| Scottsdale | Dec 9 | Dec 19 | View → | Checklist |
| Tempe | Dec 9 | Dec 19 | View → | Checklist |
| Marana | Dec 9 | Dec 19 | View → | Checklist |
| Casa Grande | Dec 12 | Dec 22 | View → | Checklist |
| Apache Junction | Dec 12 | Dec 22 | View → | Checklist |
| Bullhead City | Dec 15 | Dec 25 | View → | Checklist |
| Glendale | Dec 19 | Dec 29 | View → | Checklist |
| Peoria | Dec 19 | Dec 29 | View → | Checklist |
| Surprise | Dec 19 | Dec 29 | View → | Checklist |
| Tucson | Dec 20 | Dec 30 | View → | Checklist |
| Yuma | Dec 21 | Dec 31 | View → | Checklist |
| Avondale | Dec 25 | Jan 4 | View → | Checklist |
| Goodyear | Dec 25 | Jan 4 | View → | Checklist |
| Buckeye | Dec 25 | Jan 4 | View → | Checklist |
Back to the national Sprinkler Winterization guide, or see the methodology.
Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.