Frost dates in Mercer County, New Jersey
The average last spring frost in Mercer County falls Apr 10 to Apr 25 and the average first fall frost Oct 16 to Nov 1, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 7a to 7b. Places: Hamilton Square, Hopewell, Lawrenceville, Mercerville, Pennington, Princeton. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 08520 | Twin Rivers | Apr 25 | Oct 16 | 7a |
| 08525 | Hopewell | Apr 16 | Oct 27 | 7a |
| 08534 | Pennington | Apr 10 | Nov 1 | 7a |
| 08540 | Princeton | Apr 25 | Oct 16 | 7a |
| 08542 | Princeton | Apr 25 | Oct 16 | 7a |
| 08544 | Princeton | Apr 25 | Oct 16 | 7a |
| 08550 | Apr 25 | Oct 16 | 7a | |
| 08560 | Titusville | Apr 10 | Nov 1 | 7a |
| 08561 | Windsor | Apr 25 | Oct 16 | 7a |
| 08608 | Trenton | Apr 17 | Oct 28 | 7a |
| 08609 | Trenton | Apr 17 | Oct 28 | 7a |
| 08610 | White Horse | Apr 17 | Oct 28 | 7a |
| 08611 | Trenton | Apr 17 | Oct 28 | 7a |
| 08618 | Trenton | Apr 17 | Oct 28 | 7b |
| 08619 | Mercerville | Apr 17 | Oct 28 | 7a |
| 08620 | Yardville | Apr 25 | Oct 16 | 7a |
| 08628 | Apr 10 | Nov 1 | 7b | |
| 08629 | Trenton | Apr 17 | Oct 28 | 7a |
| 08638 | Trenton | Apr 17 | Oct 28 | 7a |
| 08648 | Lawrenceville | Apr 17 | Oct 28 | 7a |
| 08690 | Hamilton Square | Apr 25 | Oct 16 | 7a |
| 08691 | Yardville | Apr 25 | Oct 16 | 7a |
Nearby counties
Burlington County Somerset County Middlesex County Hunterdon County Monmouth County Camden County
All New Jersey counties · Download New Jersey frost dates (CSV)
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