New Hampshire · 16 stations
New Hampshire Frost Dates: 16 Weather Stations
16 NOAA weather stations in New Hampshire with at least 25 years of frost records.
| Station | Zone | Last spring frost (50%) | First fall frost (50%) | Frost-free days |
|---|---|---|---|---|
| Berlin, NH | 5a | May 14 | September 30 | 135 |
| Colebrook, NH | 4a | May 31 | September 21 | 112 |
| Concord, NH | 5b | May 8 | October 3 | 146 |
| Durham, NH | 6a | May 8 | October 4 | 148 |
| Epping, NH | 6a | May 7 | October 4 | 148 |
| First Connecticut Lake, NH | 4a | May 25 | September 24 | 121 |
| Greenland, NH | 6a | May 4 | October 8 | 157 |
| Hanover, NH | 5a | May 1 | October 13 | 162 |
| Keene, NH | 5b | May 14 | October 1 | 138 |
| Lancaster, NH | 4a | May 18 | September 30 | 132 |
| Nashua, NH | 6a | April 30 | October 12 | 165 |
| Newport, NH | 5a | May 14 | October 1 | 140 |
| North Conway, NH | 5b | May 7 | October 5 | 150 |
| Pinkham Notch, NH | 5a | May 18 | October 1 | 135 |
| York Pond, NH | 4b | May 23 | September 22 | 122 |
| near Manchester, NH | 6a | April 30 | October 11 | 164 |