Frost dates for Sussex 3 WNW, NJ
At Sussex 3 WNW, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 11, for a typical growing season of 163 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 163 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 28 | May 14 | May 30 |
| 32°F | Apr 17 | Apr 30 | May 18 |
| 28°F | Apr 4 | Apr 18 | May 5 |
| 24°F | Mar 23 | Apr 4 | Apr 17 |
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 21 | Oct 2 | Oct 15 |
| 32°F | Sep 30 | Oct 11 | Oct 27 |
| 28°F | Oct 6 | Oct 24 | Nov 9 |
| 24°F | Oct 20 | Nov 5 | Nov 22 |
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 | 121 days | 141 days | 162 days |
| 32°F | 140 days | 163 days | 184 days |
| 28°F | 166 days | 187 days | 209 days |
| 24°F | 194 days | 215 days | 236 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 |
|---|---|---|---|
| 07461 | 6b | -5 to 0°F | 5 km |
| 07851 | 6b | -5 to 0°F | 16 km |
| 18328 | 6b | -5 to 0°F | 26 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 USC00288644, at 41.2214, -74.6625, elevation 203 m (667 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 146.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Sussex Airport (4 km)
- Sussex 8 NNW (12 km)
- Newton (20 km)
- Andover Aeroflex Airport (24 km)
- Charlotteburg Rsvr (29 km)
- Wanaque Raymond Dam (37 km)
- Boonton 1 SE (43 km)
- Caldwell Essex Co Airport (50 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.