PlainHazard

New Hampshire heat

Every recorded heat record since 1996 · 9 counties with a record

NOAA's Storm Events Database records 34 heat records in New Hampshire from 1996 through June 30, 2026, about 3.3 a year since 2000. New Hampshire ranks 49th of 51 states and territories by count and 41st of 50 per square mile.

Heat in New Hampshire, 1996 to 2026

Heat records per year (NOAA Storm Events); 2026 to June 30, 2026.

  • recorded, no damage figure
  • under $1 million
  • $1 million or more
  • $10 million or more
  • $100 million or more, or 10 deaths
  • $1 billion or more, or 100 deaths
  • a year's colour: its recorded damage or deaths
  • a year with a death
Records
341996 to June 30, 2026
A year since 2000
3.3average
Deaths
00 injuries
Damage, 2025 dollars
–as filed
Busiest year
199824 records

Source: NOAA NCEI Storm Events Database, records through June 30, 2026; deaths and damage as filed, damage in 2025 dollars. Search the record at NCEI.

Are heat records common in New Hampshire?

New Hampshire averages about 3.3 heat records a year since 2000, 49th of 51 states and territories by count. The busiest year on record was 1998 (24). Per 10,000 square miles of land, New Hampshire records 38 heat records since 1996, 41st of 50 states and territories by that measure.

  1. 1. New Jersey 2320
  2. 2. Delaware 1555
  3. 3. Maryland 1330
  4. 4. Oklahoma 685
  5. 5. Illinois 590
  6. 6. Mississippi 584
  7. 7. Louisiana 576
  8. 8. Missouri 547
  9. 9. Tennessee 540
  10. 10. Puerto Rico 537
  11. 41. New Hampshire 38

Source: NOAA NCEI Storm Events Database, records since 1996, per 10,000 square miles of land area (Census Bureau 2024 Gazetteer; places under 1,000 square miles not ranked). Damage colours: Storm Events damage, 2025 dollars.

Which counties in New Hampshire have the most heat records?

Per square mile, Strafford County leads New Hampshire: 3 days with a heat record since 1996, 8.2 per 1,000 square miles of land. By raw count, Rockingham County has the most heat records (6 since 1996); large counties collect more records simply by covering more ground, so the ranking counts days with a record per unit of area (a storm filed for several forecast zones adds several records but one day).

  1. Strafford County 8.2 (3)
  2. Belknap County 5.0 (2)
  3. Hillsborough County 4.6 (5)
  4. Rockingham County 4.3 (6)
  5. Sullivan County 3.7 (2)
  6. Carroll County 3.2 (5)
  7. Merrimack County 3.2 (3)
  8. Grafton County 1.2 (4)
  9. Coos County 1.1 (4)

Source: NOAA NCEI Storm Events Database, days with a record in the county since 1996 per 1,000 square miles of land (Census Bureau 2024 Gazetteer); in brackets, the count of records.

When is the heat season in New Hampshire?

New Hampshire's heat records by month. The busiest month is March (12 records).

The values, month by month

Jan 0 · Feb 0 · Mar 12 · Apr 0 · May 0 · Jun 7 · Jul 3 · Aug 0 · Sep 0 · Oct 0 · Nov 0 · Dec 12 (records).

Source: NOAA NCEI Storm Events Database, records by the month they began, since 1996.

Are heat records becoming more frequent in New Hampshire?

New Hampshire's count per decade against the whole country's, and its share. NOAA recorded every event type only from 1996, so earlier decades are not comparable; the share of the national total is the fairer comparison across decades.

Heat: New Hampshire and the United States by decade (2020s to June 30, 2026)
DecadeNew HampshireUnited StatesNew Hampshire's share
1996-99244,3550.55%
2000s09,1630
2010s316,4450.02%
2020-26726,7960.03%

Source: NOAA NCEI Storm Events Database.

The most recent heat records in New Hampshire

The 0 most recent records, to June 30, 2026
DateRecordCharacterKilledInjuredDamage

Source: NOAA NCEI Storm Events Database, records through June 30, 2026; the newest months are revised by NCEI as reports arrive. Search the record at NCEI.

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