National Weather ServiceWashingtonFrost AdvisoryArchive to October 1, 2026
Frost Advisories in Washington
The National Weather Service issued 22 frost advisories for Washington in 2025 and 5 a year on average in 2008-2025; in 2021-2025 it had the 29th most of any state. 2026 through September: 21, 627% above the average of 3 for those months in 2008-2025. South Washington Cascade Foothills was covered most often (26 times since 2008).
How many frost advisories does Washington get?
Every frost advisory that covered part of Washington. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 21 |
| 2025 | 22 |
| 2024 | 21 |
| 2023 | 5 |
| 2022 | 8 |
| 2021 | 7 |
| 2020 | 4 |
| 2019 | 6 |
| 2018 | 1 |
| 2017 | 0 |
| 2016 | 0 |
| 2015 | 0 |
| 2014 | 0 |
| 2013 | 6 |
| 2012 | 3 |
| 2011 | 4 |
| 2010 | 2 |
| 2009 | 0 |
| 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 Washington 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 Washington?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| South Washington Cascade Foothills | 26 | 22 | April 17, 2026 |
| Willapa Hills | 25 | 13 | April 17, 2026 |
| Greater Vancouver Area | 20 | 2 | October 27, 2023 |
| Lower Columbia and I - 5 Corridor in Cowlitz County | 19 | 2 | October 27, 2023 |
| Moses Lake Area | 18 | 13 | September 28, 2026 |
| Southwest Interior | 18 | 6 | May 1, 2024 |
| North Clark County Lowlands | 17 | 17 | April 17, 2026 |
| Lower Chehalis Valley Area | 16 | 6 | May 1, 2024 |
| South Washington Coast | 14 | 1 | April 17, 2024 |
| Upper Columbia Basin | 14 | 10 | September 28, 2026 |
| Hood Canal Area | 13 | 5 | May 1, 2024 |
| Spokane Area | 13 | 8 | September 28, 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 Washington.