Frost dates in Coos County, New Hampshire
The average last spring frost in Coos County falls May 8 to May 31 and the average first fall frost Sep 19 to Oct 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4a to 5a. Places: Berlin, Colebrook, Gorham, Groveton, Lancaster, West Stewartstown. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 03570 | Berlin | May 14 | Sep 30 | 4b |
| 03575 | May 27 | Sep 19 | 5a | |
| 03576 | Colebrook | May 31 | Sep 21 | 4a |
| 03581 | Gorham | May 14 | Sep 30 | 5a |
| 03582 | Groveton | May 23 | Sep 22 | 4b |
| 03583 | May 8 | Oct 1 | 4b | |
| 03584 | Lancaster | May 18 | Sep 30 | 4b |
| 03588 | May 30 | Sep 19 | 4b | |
| 03590 | May 19 | Sep 29 | 4a | |
| 03592 | May 25 | Sep 24 | 4a | |
| 03593 | May 18 | Oct 1 | 5a | |
| 03595 | May 27 | Sep 19 | 4b | |
| 03597 | West Stewartstown | May 19 | Sep 29 | 4a |
| 03598 | Whitefield | May 27 | Sep 19 | 4b |
Nearby counties
Carroll County Grafton County Belknap County Merrimack County Strafford County Sullivan County
All New Hampshire counties · Download New Hampshire frost dates (CSV)
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