Frost dates in Sullivan County, New Hampshire
The average last spring frost in Sullivan County falls May 2 to May 21 and the average first fall frost Sep 26 to Oct 9, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5a to 6a. Places: Charlestown, Claremont, Newport, Plainfield. 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 |
|---|---|---|---|---|
| 03280 | May 2 | Oct 9 | 6a | |
| 03284 | May 21 | Sep 26 | 5b | |
| 03601 | May 14 | Oct 1 | 6a | |
| 03603 | Charlestown | May 9 | Oct 2 | 5b |
| 03605 | May 2 | Oct 9 | 6a | |
| 03607 | May 14 | Oct 1 | 5b | |
| 03743 | Claremont | May 14 | Oct 1 | 5b |
| 03745 | May 14 | Oct 1 | 5b | |
| 03751 | May 14 | Oct 1 | 5b | |
| 03752 | May 2 | Oct 9 | 6a | |
| 03753 | May 14 | Oct 1 | 5a | |
| 03770 | May 9 | Oct 6 | 5a | |
| 03773 | Newport | May 14 | Oct 1 | 5a |
| 03781 | Plainfield | May 8 | Oct 6 | 5a |
| 03782 | May 2 | Oct 9 | 5b |
Nearby counties
Merrimack County Cheshire County Belknap County Grafton County Hillsborough County Carroll County
All New Hampshire counties · Download New Hampshire frost dates (CSV)
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.