National Weather ServiceMissouriHeat AdvisoryArchive to October 1, 2026
Heat Advisories in Missouri
The National Weather Service issued 44 heat advisories for Missouri in 2025 and 42 a year on average in 2008-2025; in 2021-2025 it had the 12th most of any state. 2026 through September: 71, 69% above the average of 42 for those months in 2008-2025. Dunklin was covered most often (186 times since 2008).
How many heat advisories does Missouri get?
Every heat advisory that covered part of Missouri. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 71 |
| 2025 | 44 |
| 2024 | 61 |
| 2023 | 50 |
| 2022 | 73 |
| 2021 | 39 |
| 2020 | 30 |
| 2019 | 38 |
| 2018 | 61 |
| 2017 | 32 |
| 2016 | 49 |
| 2015 | 42 |
| 2014 | 22 |
| 2013 | 13 |
| 2012 | 50 |
| 2011 | 52 |
| 2010 | 59 |
| 2009 | 22 |
| 2008 | 18 |
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 Missouri 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 Missouri?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Dunklin | 186 | 52 | September 14, 2026 |
| Pemiscot | 180 | 51 | September 14, 2026 |
| Jasper | 136 | 37 | September 14, 2026 |
| Barton | 135 | 37 | September 14, 2026 |
| Vernon | 132 | 34 | September 14, 2026 |
| Newton | 129 | 37 | September 14, 2026 |
| Cedar | 126 | 33 | September 14, 2026 |
| McDonald | 126 | 38 | September 14, 2026 |
| St. Clair | 126 | 33 | September 14, 2026 |
| Dade | 123 | 36 | September 14, 2026 |
| Bates | 118 | 27 | September 9, 2026 |
| Hickory | 116 | 33 | September 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 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 Missouri.