National Weather ServiceOregonFreezing Fog AdvisoryArchive to October 1, 2026
Freezing Fog Advisories in Oregon
The National Weather Service issued 16 freezing fog advisories for Oregon in 2025 and 13 a year on average in 2008-2025; in 2021-2025 it had the 1st most of any state. 2026 through September: 29, 427% above the average of 6 for those months in 2008-2025. Foothills of the Northern Blue Mountains of Oregon was covered most often (85 times since 2008).
How many freezing fog advisories does Oregon get?
Every freezing fog advisory that covered part of Oregon. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 29 |
| 2025 | 16 |
| 2024 | 21 |
| 2023 | 16 |
| 2022 | 34 |
| 2021 | 8 |
| 2020 | 17 |
| 2019 | 17 |
| 2018 | 9 |
| 2017 | 25 |
| 2016 | 4 |
| 2015 | 5 |
| 2014 | 15 |
| 2013 | 19 |
| 2012 | 9 |
| 2011 | 7 |
| 2010 | 9 |
| 2009 | 10 |
| 2008 | 1 |
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 Oregon 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 Oregon?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Foothills of the Northern Blue Mountains of Oregon | 85 | 18 | January 16, 2026 |
| Eastern Curry County and Josephine County | 70 | 24 | February 20, 2026 |
| Jackson County | 63 | 19 | February 20, 2026 |
| North Central Oregon | 59 | 20 | February 6, 2026 |
| Lower Columbia Basin of Oregon | 56 | 10 | November 21, 2025 |
| Foothills of the Southern Blue Mountains of Oregon | 47 | 11 | February 6, 2026 |
| Central Oregon | 43 | 12 | February 6, 2026 |
| Klamath Basin | 21 | 6 | January 12, 2026 |
| Central Douglas County | 16 | 6 | February 20, 2026 |
| Wallowa County | 16 | 3 | January 21, 2026 |
| East Columbia River Gorge | 11 | 0 | December 5, 2020 |
| Northern Blue Mountains of Oregon | 10 | 7 | February 18, 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 Oregon.