Frozen Pipe Protection in New Hampshire

In New Hampshire, local frozen pipes deadlines run from Sep 21 to Sep 30, with a median around Sep 30 — 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.

Frozen outdoor pipe with a thick icicle after a hard freeze — protect plumbing before freezing nights arrive — New Hampshire deadlines city by city — Photo: Eva Bronzini / Pexels

Jump to a city

Notable cities

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

All New Hampshire cities

City	Local deadline	Median first 28°F
Concord	Sep 21	Oct 13	View →	Checklist
Manchester	Sep 30	Oct 24	View →	Checklist
Nashua	Sep 30	Oct 24	View →	Checklist

Local frozen pipe protection deadlines for New Hampshire cities — built from each city’s own NOAA station, not one statewide date.

Frozen Pipe Protection in New Hampshire: related searches

New Hampshire homeowners search for: pipe freeze temperature, how to keep pipes from freezing, and "frozen pipe protection near me" — every city page below answers those with local NOAA dates.

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Back to the national Frozen Pipe Protection guide, or see the methodology. You can also compare how the frozen pipe protection window shifts in Nevada and New Jersey.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 25, 2026.