# Counties in New Jersey by average annual temperature, 2025

All 21 values come from NOAA National Centers for Environmental Information for 2025, so the places are comparable.

- Indicator id: `average_temperature_annual`
- Unit: °F
- Definition: Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/average-annual-temperature/new-jersey-counties

| Rank | Place | °F |
|---:|---|---:|
| 1 | Cape May County | 55.5 |
| 1 | Gloucester County | 55.5 |
| 1 | Hudson County | 55.5 |
| 1 | Salem County | 55.5 |
| 5 | Cumberland County | 55.4 |
| 6 | Camden County | 55.2 |
| 7 | Atlantic County | 55.1 |
| 8 | Burlington County | 54.8 |
| 8 | Union County | 54.8 |
| 10 | Middlesex County | 54.6 |
| 11 | Monmouth County | 54.4 |
| 11 | Ocean County | 54.4 |
| 13 | Essex County | 54.2 |
| 14 | Mercer County | 53.9 |
| 15 | Bergen County | 53.7 |
| 16 | Somerset County | 53.2 |
| 17 | Passaic County | 51.9 |
| 18 | Hunterdon County | 51.8 |
| 19 | Morris County | 51.5 |
| 20 | Warren County | 50.4 |
| 21 | Sussex County | 49.9 |