Frost dates for Boonton 1 SE, NJ
At Boonton 1 SE, the median last spring frost (32°F) is Apr 17 and the median first fall frost is Oct 23, for a typical growing season of 189 days. For a 90% chance that the last frost has passed, wait until May 5. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 17Last spring frost (median)50% chance of 32°F after this date
- May 5Safer planting date10% chance of 32°F after this date
- Oct 23First fall frost (median)50% chance of 32°F by this date
- 189 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 4 | Apr 17 | May 5 |
| 28°F | Mar 21 | Apr 4 | Apr 18 |
| 24°F | Mar 9 | Mar 25 | Apr 6 |
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 1 | Oct 12 | Oct 29 |
| 32°F | Oct 8 | Oct 23 | Nov 6 |
| 28°F | Oct 19 | Nov 2 | Nov 17 |
| 24°F | Oct 31 | Nov 14 | Dec 1 |
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 | 145 days | 166 days | 186 days |
| 32°F | 166 days | 189 days | 209 days |
| 28°F | 192 days | 212 days | 231 days |
| 24°F | 214 days | 234 days | 256 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 |
|---|---|---|---|
| 07034 | 7a | 0 to 5°F | 2 km |
| 07045 | 7a | 0 to 5°F | 3 km |
| 07046 | 6b | -5 to 0°F | 4 km |
| 07054 | 7a | 0 to 5°F | 4 km |
| 07005 | 6b | -5 to 0°F | 4 km |
| 07058 | 7a | 0 to 5°F | 5 km |
| 07082 | 7a | 0 to 5°F | 6 km |
| 07834 | 6b | -5 to 0°F | 8 km |
| 07981 | 7a | 0 to 5°F | 8 km |
| 07950 | 6b | -5 to 0°F | 9 km |
| 07927 | 7a | 0 to 5°F | 9 km |
| 07842 | 6b | -5 to 0°F | 11 km |
| 07801 | 6b | -5 to 0°F | 14 km |
| 07869 | 6b | -5 to 0°F | 16 km |
| 07803 | 6b | -5 to 0°F | 17 km |
| 07970 | 6b | -5 to 0°F | 17 km |
| 07926 | 6b | -5 to 0°F | 18 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 USC00280907, at 40.8917, -74.3964, elevation 85 m (280 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 124.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Caldwell Essex Co Airport (10 km)
- Essex Fells Service Bldg (11 km)
- Little Falls (14 km)
- Charlotteburg Rsvr (16 km)
- Canoe Brook (17 km)
- Wanaque Raymond Dam (19 km)
- Cranford (26 km)
- Harrison (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.