Frost dates for Hightstown 2 W, NJ
At Hightstown 2 W, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 16, for a typical growing season of 173 days. For a 90% chance that the last frost has passed, wait until May 12. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 12Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 173 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 24 | May 8 | May 23 |
| 32°F | Apr 12 | Apr 25 | May 12 |
| 28°F | Mar 26 | Apr 10 | Apr 26 |
| 24°F | Mar 11 | Mar 28 | Apr 10 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Sep 26 | Oct 6 | Oct 19 |
| 32°F | Oct 4 | Oct 16 | Oct 29 |
| 28°F | Oct 13 | Oct 28 | Nov 11 |
| 24°F | Oct 25 | Nov 8 | Nov 27 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 132 days | 151 days | 171 days |
| 32°F | 153 days | 173 days | 194 days |
| 28°F | 178 days | 200 days | 221 days |
| 24°F | 204 days | 226 days | 250 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 08520 | 7a | 0 to 5°F | 2 km |
| 08561 | 7a | 0 to 5°F | 3 km |
| 08550 | 7a | 0 to 5°F | 5 km |
| 08691 | 7a | 0 to 5°F | 7 km |
| 08512 | 7a | 0 to 5°F | 7 km |
| 08536 | 7a | 0 to 5°F | 8 km |
| 08690 | 7a | 0 to 5°F | 9 km |
| 08555 | 7a | 0 to 5°F | 9 km |
| 08501 | 7a | 0 to 5°F | 11 km |
| 08535 | 7a | 0 to 5°F | 12 km |
| 08544 | 7a | 0 to 5°F | 12 km |
| 08542 | 7a | 0 to 5°F | 13 km |
| 08810 | 7a | 0 to 5°F | 13 km |
| 08620 | 7a | 0 to 5°F | 13 km |
| 08540 | 7a | 0 to 5°F | 13 km |
| 08831 | 7a | 0 to 5°F | 13 km |
| 08528 | 7a | 0 to 5°F | 14 km |
| 08510 | 7a | 0 to 5°F | 15 km |
| 08514 | 7a | 0 to 5°F | 16 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00283951, at 40.2664, -74.5642, elevation 30 m (100 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 114.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Trenton State College (19 km)
- Trenton Mercer Co Airport (21 km)
- New Brunswick 3 SE (26 km)
- Freehold-Marlboro (27 km)
- Wertsville 4 NE (28 km)
- Lambertville (34 km)
- Philadelphia/mt Holly WFO (35 km)
- Somerville 4 NW (40 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.