National Weather ServiceNew HampshireFrost AdvisoryArchive to October 1, 2026
Frost Advisories in New Hampshire
The National Weather Service issued 8 frost advisories for New Hampshire in 2025 and 10 a year on average in 2008-2025; in 2021-2025 it had the 35th most of any state. 2026 through September: 10, 45% above the average of 7 for those months in 2008-2025. Northern Carroll was covered most often (68 times since 2008).
How many frost advisories does New Hampshire get?
Every frost advisory that covered part of New Hampshire. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 10 |
| 2025 | 8 |
| 2024 | 4 |
| 2023 | 9 |
| 2022 | 12 |
| 2021 | 3 |
| 2020 | 12 |
| 2019 | 6 |
| 2018 | 10 |
| 2017 | 5 |
| 2016 | 6 |
| 2015 | 11 |
| 2014 | 11 |
| 2013 | 18 |
| 2012 | 11 |
| 2011 | 9 |
| 2010 | 11 |
| 2009 | 16 |
| 2008 | 11 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does New Hampshire get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in New Hampshire?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Northern Carroll | 68 | 19 | September 24, 2026 |
| Northern Grafton | 67 | 17 | September 24, 2026 |
| Southern Carroll | 63 | 15 | September 24, 2026 |
| Southern Grafton | 58 | 13 | September 24, 2026 |
| Northern Coos | 52 | 11 | September 15, 2026 |
| Cheshire | 51 | 8 | May 22, 2026 |
| Southern Coos | 50 | 11 | September 15, 2026 |
| Sullivan | 50 | 8 | May 22, 2026 |
| Belknap | 49 | 7 | May 13, 2026 |
| Merrimack | 47 | 6 | May 12, 2026 |
| Strafford | 44 | 6 | May 13, 2026 |
| Western And Central Hillsborough | 40 | 3 | May 12, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a frost advisory?
A frost advisory means frost is expected on clear, calm nights during the growing season, with temperatures a few degrees above freezing. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in New Hampshire.