National Weather ServiceOhioHeat AdvisoryArchive to October 1, 2026
Heat Advisories in Ohio
The National Weather Service issued 27 heat advisories for Ohio in 2025 and 17 a year on average in 2008-2025; in 2021-2025 it had the 25th most of any state. 2026 through September: 26, 58% above the average of 17 for those months in 2008-2025. Lawrence was covered most often (76 times since 2008).
How many heat advisories does Ohio get?
Every heat advisory that covered part of Ohio. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 26 |
| 2025 | 27 |
| 2024 | 18 |
| 2023 | 16 |
| 2022 | 28 |
| 2021 | 19 |
| 2020 | 11 |
| 2019 | 6 |
| 2018 | 18 |
| 2017 | 4 |
| 2016 | 17 |
| 2015 | 3 |
| 2014 | 2 |
| 2013 | 13 |
| 2012 | 50 |
| 2011 | 38 |
| 2010 | 25 |
| 2009 | 2 |
| 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 Ohio 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 Ohio?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Lawrence | 76 | 19 | September 1, 2026 |
| Gallia | 75 | 19 | September 1, 2026 |
| Butler | 74 | 16 | September 1, 2026 |
| Clermont | 71 | 15 | September 1, 2026 |
| Adams | 70 | 16 | September 1, 2026 |
| Brown | 70 | 16 | September 1, 2026 |
| Scioto | 69 | 16 | September 1, 2026 |
| Warren | 68 | 14 | September 1, 2026 |
| Highland | 67 | 16 | September 1, 2026 |
| Pike | 66 | 16 | September 1, 2026 |
| Clinton | 63 | 15 | September 1, 2026 |
| Jackson | 62 | 17 | September 1, 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 Ohio.