National Weather ServiceMontanaFreezing Fog AdvisoryArchive to October 1, 2026
Freezing Fog Advisories in Montana
The National Weather Service issued 1 freezing fog advisories for Montana in 2025 and 5 a year on average in 2008-2025; in 2021-2025 it had the 23rd most of any state. 2026 through September: 1, 58% below the average of 2 for those months in 2008-2025. Eastern Glacier was covered most often (33 times since 2008).
How many freezing fog advisories does Montana get?
Every freezing fog advisory that covered part of Montana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 1 |
| 2025 | 1 |
| 2024 | 3 |
| 2023 | 0 |
| 2022 | 1 |
| 2021 | 0 |
| 2020 | 1 |
| 2019 | 2 |
| 2018 | 7 |
| 2017 | 7 |
| 2016 | 8 |
| 2015 | 10 |
| 2014 | 11 |
| 2013 | 3 |
| 2012 | 2 |
| 2011 | 4 |
| 2010 | 21 |
| 2009 | 2 |
| 2008 | 3 |
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 |
|---|---|---|---|
| Eastern Glacier | 33 | 0 | March 16, 2018 |
| Toole | 31 | 0 | March 16, 2018 |
| Eastern Pondera | 30 | 0 | March 16, 2018 |
| Liberty | 28 | 0 | March 16, 2018 |
| Hill | 26 | 0 | March 16, 2018 |
| Eastern Teton | 25 | 0 | March 16, 2018 |
| Chouteau | 24 | 0 | March 16, 2018 |
| Blaine | 23 | 0 | March 16, 2018 |
| Cascade | 23 | 0 | March 16, 2018 |
| Central and Southern Lewis and Clark | 20 | 0 | December 14, 2017 |
| Missoula/Bitterroot Valleys | 19 | 4 | January 4, 2026 |
| Flathead/Mission Valleys | 15 | 2 | January 4, 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 freezing fog advisory?
A freezing fog advisory means fog will freeze on roads, bridges and other surfaces, making them slippery while it cuts visibility. 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.