Frost dates for Essex Fells Service Bldg, NJ
At Essex Fells Service Bldg, the median last spring frost (32°F) is Apr 18 and the median first fall frost is Oct 24, for a typical growing season of 187 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 18Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 187 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 17 | May 1 | May 18 |
| 32°F | Apr 3 | Apr 18 | May 7 |
| 28°F | Mar 22 | Apr 3 | Apr 19 |
| 24°F | Mar 9 | Mar 24 | Apr 5 |
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 30 | Oct 11 | Oct 26 |
| 32°F | Oct 8 | Oct 24 | Nov 6 |
| 28°F | Oct 21 | Nov 4 | Nov 20 |
| 24°F | Nov 1 | Nov 18 | Dec 6 |
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 | 142 days | 161 days | 182 days |
| 32°F | 164 days | 187 days | 207 days |
| 28°F | 190 days | 212 days | 236 days |
| 24°F | 216 days | 239 days | 264 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 |
|---|---|---|---|
| 07021 | 7a | 0 to 5°F | 1 km |
| 07006 | 7a | 0 to 5°F | 2 km |
| 07068 | 7a | 0 to 5°F | 2 km |
| 07044 | 7a | 0 to 5°F | 4 km |
| 07052 | 7a | 0 to 5°F | 5 km |
| 07042 | 7a | 0 to 5°F | 6 km |
| 07936 | 7a | 0 to 5°F | 7 km |
| 07028 | 7a | 0 to 5°F | 7 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 USC00282768, at 40.8314, -74.2858, elevation 107 m (350 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 118.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Caldwell Essex Co Airport (5 km)
- Little Falls (8 km)
- Canoe Brook (11 km)
- Boonton 1 SE (11 km)
- Harrison (15 km)
- Cranford (19 km)
- Teterboro Airport (19 km)
- Newark Intl Airport (19 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.