National Weather ServiceMontanaHeat AdvisoryArchive to October 1, 2026
Heat Advisories in Montana
The National Weather Service issued 10 heat advisories for Montana in 2025 and 5 a year on average in 2008-2025; in 2021-2025 it had the 35th most of any state. 2026 through September: 10, 96% above the average of 5 for those months in 2008-2025. Garfield was covered most often (34 times since 2008).
How many heat advisories does Montana get?
Every heat advisory that covered part of Montana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 10 |
| 2025 | 10 |
| 2024 | 11 |
| 2023 | 8 |
| 2022 | 19 |
| 2021 | 18 |
| 2020 | 8 |
| 2019 | 0 |
| 2018 | 7 |
| 2017 | 7 |
| 2016 | 1 |
| 2015 | 1 |
| 2014 | 0 |
| 2013 | 1 |
| 2012 | 0 |
| 2011 | 1 |
| 2010 | 0 |
| 2009 | 0 |
| 2008 | 0 |
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 Montana 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 Montana?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Garfield | 34 | 11 | July 13, 2026 |
| Prairie | 33 | 12 | July 29, 2026 |
| Central and Southeast Phillips | 31 | 10 | July 13, 2026 |
| Central and Southern Valley | 31 | 10 | July 13, 2026 |
| Dawson | 31 | 12 | July 29, 2026 |
| McCone | 31 | 12 | July 29, 2026 |
| Petroleum | 31 | 10 | July 13, 2026 |
| Richland | 29 | 11 | July 29, 2026 |
| Southwest Phillips | 29 | 8 | July 13, 2026 |
| Western Roosevelt | 29 | 12 | July 29, 2026 |
| Eastern Roosevelt | 28 | 11 | July 29, 2026 |
| Wibaux | 28 | 10 | July 29, 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 heat advisory?
A heat advisory means heat that can make people ill, especially those without cooling, below the office's extreme heat warning values. 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 Montana.