Arizona frost dates: M
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Mammoth | Feb 4 | Dec 8 | 307 d | 9a |
| Many Farms | May 6 | Oct 8 | 155 d | 7a |
| Marana | Feb 23 | Dec 6 | 286 d | 9b |
| Marble Canyon | Mar 5 | Nov 19 | 259 d | 7b |
| Maricopa | Feb 23 | Nov 24 | 274 d | 9a |
| Mayer | Apr 5 | Nov 17 | 226 d | 8b |
| Mc Neal | Apr 1 | Nov 10 | 223 d | 8b |
| Mcnary | May 20 | Oct 11 | 144 d | 6b |
| Meadview | Mar 5 | Nov 28 | 268 d | 9a |
| Mesa | Feb 1 | Dec 10 | 312 d | 9b |
| Miami | Feb 24 | Dec 1 | 280 d | 8a |
| Mohave Valley | Jan 6 | Jan 2 | 361 d | 9a |
| Morenci | Feb 26 | Nov 23 | 270 d | 8b |
| Mormon Lake | Jun 10 | Sep 27 | 109 d | 6b |
| Morristown | Feb 5 | Dec 11 | 309 d | 9b |
| Mount Lemmon | Apr 1 | Nov 19 | 232 d | 8b |
| Munds Park | Jun 10 | Sep 27 | 109 d | 7a |