Climate & Weather in Merrimack

Merrimack has a real, genuinely humid continental climate typical of southern New Hampshire, with cold winters, four distinct seasons, and real flood-risk relevance tied to the Merrimack River.

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Cold winters and four distinct seasons

Merrimack's southern New Hampshire position brings genuinely cold winters and four distinct seasons consistent with the broader region.

Real Merrimack River flood-risk relevance

Merrimack is bisected by the Merrimack River, carrying real, disclosed flood-risk relevance consistent with the broader river-valley flood history this project has documented elsewhere in New Hampshire.

No hurricane, tornado, or significant earthquake risk

Consistent with New Hampshire's broader statewide research context, Merrimack carries no meaningful hurricane, tornado, or significant earthquake exposure, alongside real winter-storm risk.

Key takeaways

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Last reviewed: 2026-08-28. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.