Massachusetts frost dates: N
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Nahant | Apr 25 | Oct 20 | 178 d | 7a |
| Nantucket | Apr 13 | Nov 8 | 209 d | 7b |
| Natick | Apr 26 | Oct 12 | 169 d | 6b |
| Needham | Apr 26 | Oct 12 | 169 d | 6b |
| Needham Heights | Apr 19 | Oct 23 | 187 d | 6b |
| New Bedford | Apr 29 | Oct 15 | 169 d | 7a |
| New Braintree | May 12 | Oct 1 | 142 d | 6a |
| New Salem | May 4 | Oct 8 | 157 d | 5b |
| New Town | May 2 | Oct 6 | 157 d | 6b |
| Newbury | May 3 | Oct 8 | 158 d | 6b |
| Newburyport | May 3 | Oct 8 | 158 d | 6b |
| Newton | Apr 19 | Oct 23 | 187 d | 6b |
| Newton Center | Apr 19 | Oct 23 | 187 d | 6b |
| Newton Highlands | Apr 19 | Oct 23 | 187 d | 6b |
| Newton Lower Falls | Apr 26 | Oct 12 | 169 d | 6b |
| Newton Upper Falls | Apr 19 | Oct 23 | 187 d | 6b |
| Newtonville | Apr 19 | Oct 23 | 187 d | 6b |
| Nonantum | Apr 19 | Oct 23 | 187 d | 6b |
| Norfolk | Apr 27 | Oct 14 | 170 d | 6b |
| North Adams | May 10 | Oct 4 | 147 d | 5b |
| North Amherst | May 5 | Oct 8 | 156 d | 6a |
| North Andover | Apr 21 | Oct 21 | 183 d | 6b |
| North Attleboro | Apr 22 | Oct 19 | 180 d | 6b |
| North Billerica | Apr 30 | Oct 10 | 163 d | 6b |
| North Brookfield | Apr 23 | Oct 21 | 181 d | 6a |
| North Carver | Apr 30 | Oct 16 | 169 d | 6b |
| North Chatham | Apr 13 | Nov 4 | 205 d | 7b |
| North Chelmsford | Apr 30 | Oct 10 | 163 d | 6b |
| North Dartmouth | Apr 29 | Oct 15 | 169 d | 7a |
| North Dighton | Apr 22 | Oct 19 | 180 d | 6b |
| North Eastham | Apr 13 | Nov 4 | 205 d | 7b |
| North Easton | Apr 22 | Oct 19 | 180 d | 6b |
| North Egremont | May 4 | Oct 11 | 160 d | 6a |
| North Falmouth | Apr 11 | Nov 11 | 214 d | 7a |
| North Grafton | Apr 23 | Oct 21 | 181 d | 6b |
| North Hatfield | May 5 | Oct 8 | 156 d | 6a |
| North Marshfield | Apr 25 | Oct 22 | 180 d | 7a |
| North Oxford | May 1 | Oct 10 | 162 d | 6a |
| North Pembroke | Apr 15 | Nov 1 | 200 d | 6b |
| North Reading | Apr 25 | Oct 17 | 175 d | 6b |
| North Scituate | Apr 25 | Oct 22 | 180 d | 7a |
| North Truro | Apr 13 | Nov 4 | 205 d | 7b |
| North Uxbridge | Apr 22 | Oct 19 | 180 d | 6b |
| North Waltham | Apr 19 | Oct 23 | 187 d | 6b |
| North Weymouth | Apr 25 | Oct 22 | 180 d | 7a |
| Northampton | May 5 | Oct 8 | 156 d | 6a |
| Northborough | Apr 23 | Oct 21 | 181 d | 6b |
| Northbridge | Apr 30 | Oct 9 | 162 d | 6b |
| Northfield | May 1 | Oct 11 | 163 d | 5b |
| Norton | Apr 27 | Oct 15 | 171 d | 6b |
| Norwell | Apr 25 | Oct 22 | 180 d | 7a |
| Norwood | Apr 25 | Oct 9 | 167 d | 6b |
| Nutting Lake | Apr 27 | Oct 13 | 169 d | 6b |