Arizona frost dates: B
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Bagdad | Apr 7 | Nov 12 | 219 d | 9a |
| Bapchule | Feb 23 | Nov 24 | 274 d | 9b |
| Bellemont | Jun 21 | Sep 17 | 88 d | 5b |
| Benson | Apr 12 | Nov 1 | 203 d | 8b |
| Bisbee | Apr 1 | Nov 10 | 223 d | 8b |
| Black Canyon City | Jan 15 | Dec 22 | 341 d | 9a |
| Blue | Jun 17 | Sep 21 | 96 d | 8a |
| Blue Gap | May 6 | Oct 8 | 155 d | 7a |
| Bouse | Feb 18 | Nov 28 | 283 d | 9a |
| Bowie | Apr 1 | Nov 6 | 219 d | 8b |
| Buckeye | Jan 7 | Dec 24 | 351 d | 9b |
| Bullhead City | Jan 4 | Dec 23 | 353 d | 10a |
| Bylas | Apr 1 | Nov 6 | 219 d | 8b |