National Weather ServiceNew JerseyExtreme Heat WarningArchive to October 1, 2026
Extreme Heat Warnings in New Jersey
The National Weather Service issued 5 extreme heat warnings for New Jersey in 2025 and 4 a year on average in 2008-2025; in 2021-2025 it had the 29th most of any state. 2026 through September: 3, 16% below the average of 4 for those months in 2008-2025. Northwestern Burlington was covered most often (46 times since 2008).
How many extreme heat warnings does New Jersey get?
Every extreme heat warning that covered part of New Jersey. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 3 |
| 2025 | 5 |
| 2024 | 6 |
| 2023 | 2 |
| 2022 | 2 |
| 2021 | 5 |
| 2020 | 1 |
| 2019 | 3 |
| 2018 | 2 |
| 2017 | 2 |
| 2016 | 5 |
| 2015 | 2 |
| 2014 | 0 |
| 2013 | 4 |
| 2012 | 8 |
| 2011 | 6 |
| 2010 | 6 |
| 2009 | 1 |
| 2008 | 4 |
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 New Jersey 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 New Jersey?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Northwestern Burlington | 46 | 11 | July 15, 2026 |
| Mercer | 46 | 11 | July 15, 2026 |
| Gloucester | 46 | 11 | July 15, 2026 |
| Camden | 46 | 11 | July 15, 2026 |
| Somerset | 21 | 10 | July 15, 2026 |
| Hudson | 21 | 5 | July 1, 2026 |
| Middlesex | 20 | 10 | July 15, 2026 |
| Western Monmouth | 19 | 10 | July 15, 2026 |
| Eastern Passaic | 19 | 5 | July 1, 2026 |
| Eastern Union | 18 | 5 | July 1, 2026 |
| Eastern Essex | 18 | 5 | July 1, 2026 |
| Eastern Bergen | 18 | 5 | July 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.
The latest extreme heat warnings for New Jersey in AreaZine's record
NWS Mount HollyWarningJuly 14, 2026
Extreme Heat Warning: Eastern Monmouth, NJ
Expired 8:00 p.m. EDT, July 15, 2026
NWS UptonWarningJuly 3, 2026
Extreme Heat Warning: Northern Fairfield, Northern New Haven, Northern Middlesex and 16 more, CT and NJ
Expired 9:00 p.m. EDT, July 4, 2026
NWS Mount HollyWarningJuly 1, 2026
Extreme Heat Warning: Cumberland, Atlantic and Cape May, NJ
Expired 8:00 p.m. EDT, July 4, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is an extreme heat warning?
An extreme heat warning means dangerous heat is expected, measured by heat index or temperature thresholds each office sets. It replaced the excessive heat warning in 2025. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. AreaZine's counts include the excessive heat warnings issued before the change. The national record · Every warning type in New Jersey.