National Weather ServiceWisconsinFrost AdvisoryArchive to October 1, 2026
Frost Advisories in Wisconsin
The National Weather Service issued 37 frost advisories for Wisconsin in 2025 and 31 a year on average in 2008-2025; in 2021-2025 it had the 4th most of any state. 2026 through September: 42, 92% above the average of 22 for those months in 2008-2025. Forest was covered most often (107 times since 2008).
How many frost advisories does Wisconsin get?
Every frost advisory that covered part of Wisconsin. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 43 |
| 2025 | 37 |
| 2024 | 35 |
| 2023 | 34 |
| 2022 | 24 |
| 2021 | 45 |
| 2020 | 45 |
| 2019 | 11 |
| 2018 | 8 |
| 2017 | 34 |
| 2016 | 39 |
| 2015 | 37 |
| 2014 | 31 |
| 2013 | 33 |
| 2012 | 32 |
| 2011 | 34 |
| 2010 | 34 |
| 2009 | 27 |
| 2008 | 21 |
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 Wisconsin 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 Wisconsin?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Forest | 107 | 26 | September 23, 2026 |
| Florence | 104 | 23 | September 23, 2026 |
| Oneida | 102 | 28 | September 23, 2026 |
| Vilas | 100 | 26 | September 23, 2026 |
| Lincoln | 99 | 29 | September 23, 2026 |
| Langlade | 93 | 21 | September 14, 2026 |
| Iron | 85 | 33 | October 2, 2026 |
| Northern Marinette County | 85 | 14 | September 14, 2026 |
| Ashland | 83 | 32 | October 2, 2026 |
| Marathon | 83 | 19 | May 14, 2026 |
| Price | 83 | 31 | September 23, 2026 |
| Portage | 81 | 17 | May 14, 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 Wisconsin.