Frost dates in Merrimack County, New Hampshire
The average last spring frost in Merrimack County falls Apr 30 to May 21 and the average first fall frost Sep 26 to Oct 11, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 6a. Places: Blodgett Landing, Bradford, Concord, Contoocook, Franklin, Henniker. 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 |
|---|---|---|---|---|
| 03046 | May 2 | Oct 8 | 6a | |
| 03106 | South Hooksett | Apr 30 | Oct 11 | 6a |
| 03216 | May 14 | Sep 29 | 5b | |
| 03221 | Bradford | May 15 | Sep 27 | 5b |
| 03224 | May 14 | Sep 29 | 5b | |
| 03229 | Contoocook | May 6 | Oct 1 | 5b |
| 03230 | May 21 | Sep 26 | 5a | |
| 03231 | May 14 | Sep 29 | 5b | |
| 03233 | May 2 | Oct 9 | 5b | |
| 03234 | May 8 | Oct 3 | 5b | |
| 03235 | Franklin | May 7 | Oct 3 | 5b |
| 03242 | Henniker | May 2 | Oct 8 | 5b |
| 03243 | May 21 | Sep 26 | 5b | |
| 03255 | Blodgett Landing | May 2 | Oct 9 | 5b |
| 03257 | New London | May 2 | Oct 9 | 5b |
| 03258 | May 8 | Oct 3 | 5b | |
| 03260 | May 2 | Oct 9 | 5b | |
| 03263 | Pittsfield | May 8 | Oct 3 | 5b |
| 03268 | May 14 | Sep 29 | 5b | |
| 03273 | May 2 | Oct 9 | 5b | |
| 03275 | Suncook | May 8 | Oct 3 | 6a |
| 03276 | Tilton Northfield | May 14 | Sep 29 | 5b |
| 03278 | Warner | May 14 | Sep 29 | 5b |
| 03287 | May 21 | Sep 26 | 5b | |
| 03301 | Concord | May 8 | Oct 3 | 5b |
| 03303 | Concord | May 14 | Sep 29 | 5b |
| 03304 | May 8 | Oct 3 | 6a | |
| 03307 | Loudon | May 8 | Oct 3 | 5b |
Nearby counties
Belknap County Sullivan County Hillsborough County Strafford County Cheshire County Rockingham County
All New Hampshire counties · Download New Hampshire frost dates (CSV)
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