# Frost dates for Dover, NH (03820)

**Do this (Safe, 2026-11-02):** Frost season started Sep 27. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 16 | Sep 27 | 134 |
| Median | May 3 | Oct 10 | 160 |
| Bold (9 in 10 years later) | Apr 23 | Oct 25 | 185 |

Frost = 32°F. Station: Durham 2 N, NH, 2 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 45°F — Go (tonight)
- 2026-11-03: 46°F — Go
- 2026-11-04: 50°F — Go
- 2026-11-05: 54°F — Go
- 2026-11-06: 49°F — Go
- 2026-11-07: 42°F — Go
- 2026-11-08: 37°F — Wait

Go above 40°F · Wait 37–40°F · Cover 36°F or less · Freeze 28°F or less.

Source: Frost dates: NOAA NCEI U.S. Climate Normals 1991–2020, station Durham 2 N, NH (2 mi, 115 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/nh/dover · JSON: https://frostdatecalculator.com/p/nh/dover?format=json