National Weather ServiceIndianaHeat AdvisoryArchive to October 1, 2026
Heat Advisories in Indiana
The National Weather Service issued 34 heat advisories for Indiana in 2025 and 21 a year on average in 2008-2025; in 2021-2025 it had the 21st most of any state. 2026 through September: 48, 124% above the average of 21 for those months in 2008-2025. Knox was covered most often (77 times since 2008).
How many heat advisories does Indiana get?
Every heat advisory that covered part of Indiana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 48 |
| 2025 | 34 |
| 2024 | 21 |
| 2023 | 23 |
| 2022 | 37 |
| 2021 | 27 |
| 2020 | 10 |
| 2019 | 5 |
| 2018 | 16 |
| 2017 | 5 |
| 2016 | 13 |
| 2015 | 8 |
| 2014 | 4 |
| 2013 | 5 |
| 2012 | 47 |
| 2011 | 47 |
| 2010 | 68 |
| 2009 | 13 |
| 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 Indiana 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 Indiana?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Knox | 77 | 17 | September 1, 2026 |
| Sullivan | 77 | 17 | September 1, 2026 |
| Daviess | 76 | 17 | September 1, 2026 |
| Dearborn | 76 | 17 | September 1, 2026 |
| Ripley | 76 | 17 | September 1, 2026 |
| Ohio | 75 | 17 | September 1, 2026 |
| Switzerland | 75 | 17 | September 1, 2026 |
| Greene | 74 | 17 | September 1, 2026 |
| Martin | 74 | 17 | September 1, 2026 |
| Franklin | 72 | 16 | September 1, 2026 |
| Perry | 72 | 25 | September 19, 2026 |
| Vigo | 71 | 15 | 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 Indiana.