Frost dates for Harrison, NJ
At Harrison, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Nov 6, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 16. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 16Safer planting date10% chance of 32°F after this date
- Nov 6First fall frost (median)50% chance of 32°F by this date
- 216 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 4 | Apr 16 | May 2 |
| 32°F | Mar 23 | Apr 4 | Apr 16 |
| 28°F | Mar 11 | Mar 26 | Apr 5 |
| 24°F | Feb 28 | Mar 16 | Mar 29 |
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 | Oct 12 | Oct 27 | Nov 9 |
| 32°F | Oct 25 | Nov 6 | Nov 22 |
| 28°F | Nov 5 | Nov 19 | Dec 5 |
| 24°F | Nov 15 | Dec 1 | Dec 21 |
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 | 173 days | 192 days | 211 days |
| 32°F | 197 days | 216 days | 237 days |
| 28°F | 218 days | 238 days | 259 days |
| 24°F | 238 days | 259 days | 285 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 |
|---|---|---|---|
| 07029 | 7b | 5 to 10°F | 1 km |
| 07102 | 7b | 5 to 10°F | 2 km |
| 07032 | 7b | 5 to 10°F | 2 km |
| 07104 | 7b | 5 to 10°F | 3 km |
| 07105 | 7b | 5 to 10°F | 3 km |
| 07107 | 7b | 5 to 10°F | 3 km |
| 07103 | 7b | 5 to 10°F | 4 km |
| 07031 | 7b | 5 to 10°F | 5 km |
| 07108 | 7b | 5 to 10°F | 5 km |
| 07109 | 7b | 5 to 10°F | 5 km |
| 07017 | 7a | 0 to 5°F | 5 km |
| 07018 | 7a | 0 to 5°F | 6 km |
| 07071 | 7b | 5 to 10°F | 6 km |
| 07106 | 7a | 0 to 5°F | 7 km |
| 07306 | 7b | 5 to 10°F | 7 km |
| 07304 | 7b | 5 to 10°F | 7 km |
| 07050 | 7a | 0 to 5°F | 7 km |
| 07003 | 7a | 0 to 5°F | 7 km |
| 07110 | 7b | 5 to 10°F | 8 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 USC00283704, at 40.7481, -74.1519, elevation 7 m (24 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 82.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newark Intl Airport (7 km)
- Teterboro Airport (14 km)
- Essex Fells Service Bldg (15 km)
- Little Falls (17 km)
- Canoe Brook (17 km)
- Cranford (17 km)
- Caldwell Essex Co Airport (18 km)
- Boonton 1 SE (26 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.