Ice Dam Prevention in New Hampshire

In New Hampshire, local ice dams deadlines run from Oct 16 to Oct 16, with a median around Oct 16 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Jump to a city

Notable cities

Manchester — earliest deadline in the state
Concord — latest deadline in the state
Nashua — near the state median

All New Hampshire cities

City	Local deadline	Median first 28°F
Manchester	Oct 16	Oct 24	View →	Checklist
Nashua	Oct 16	Oct 24	View →	Checklist
Concord	Oct 16	Oct 13	View →	Checklist

Back to the national Ice Dam Prevention guide, or see the methodology.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.