Frost dates across Arizona
Typical last spring frost, first fall frost, and USDA zone for 19 Arizona cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
Not on the list? Any Arizona ZIP works.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Phoenix | Jan 21 | Dec 16 | about 329 days | 10a |
| Tucson | Jan 20 | Dec 17 | about 331 days | 9b |
| Mesa | Feb 13 | Dec 5 | about 295 days | 9b |
| Chandler | Feb 13 | Dec 5 | about 295 days | 9b |
| Gilbert | Feb 1 | Dec 10 | about 312 days | 9b |
| Glendale | Jan 20 | Dec 15 | about 329 days | 9b |
| Scottsdale | Feb 13 | Dec 5 | about 295 days | 9b |
| Peoria | Jan 20 | Dec 15 | about 329 days | 9b |
| Tempe | Feb 13 | Dec 5 | about 295 days | 9b |
| Surprise | Jan 20 | Dec 15 | about 329 days | 9b |
| Yuma | Jan 8 | Dec 28 | about 354 days | 10a |
| Flagstaff | Jun 4 | Sep 28 | about 116 days | 6a |
| Lake Havasu City | Jan 5 | Dec 29 | about 358 days | 10a |
| Prescott Valley | Apr 20 | Oct 27 | about 190 days | 7b |
| Sierra Vista | Apr 5 | Nov 9 | about 218 days | 8b |
| Kingman | Apr 2 | Nov 11 | about 223 days | 8b |
| Payson | Apr 29 | Oct 24 | about 178 days | 8b |
| Show Low | May 5 | Oct 15 | about 163 days | 7a |
| Safford | Mar 25 | Nov 9 | about 229 days | 8b |
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