Frost dates for Andover Aeroflex Airport, NJ
At Andover Aeroflex Airport, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 19, for a typical growing season of 175 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 19First fall frost (median)50% chance of 32°F by this date
- 175 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 22 | May 7 | May 22 |
| 32°F | Apr 12 | Apr 25 | May 11 |
| 28°F | Mar 31 | Apr 11 | Apr 28 |
| 24°F | Mar 16 | Mar 31 | Apr 12 |
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 22 |
| 32°F | Oct 5 | Oct 19 | Nov 3 |
| 28°F | Oct 15 | Oct 31 | Nov 13 |
| 24°F | Oct 27 | Nov 12 | Nov 29 |
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 | 152 days | 172 days |
| 32°F | 153 days | 175 days | 198 days |
| 28°F | 178 days | 202 days | 222 days |
| 24°F | 207 days | 227 days | 248 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 |
|---|---|---|---|
| 07821 | 6b | -5 to 0°F | 5 km |
| 07874 | 6b | -5 to 0°F | 9 km |
| 07871 | 6b | -5 to 0°F | 10 km |
| 07843 | 6b | -5 to 0°F | 10 km |
| 07820 | 6b | -5 to 0°F | 10 km |
| 07849 | 6b | -5 to 0°F | 12 km |
| 07846 | 6b | -5 to 0°F | 13 km |
| 07857 | 6b | -5 to 0°F | 13 km |
| 07850 | 6b | -5 to 0°F | 13 km |
| 07856 | 6b | -5 to 0°F | 14 km |
| 07828 | 6b | -5 to 0°F | 14 km |
| 07852 | 6b | -5 to 0°F | 15 km |
| 07885 | 6b | -5 to 0°F | 16 km |
| 07847 | 6b | -5 to 0°F | 17 km |
| 07840 | 6b | -5 to 0°F | 18 km |
| 07876 | 6b | -5 to 0°F | 18 km |
| 07836 | 6b | -5 to 0°F | 19 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 USW00054779, at 41.0089, -74.7367, elevation 178 m (583 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 127.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newton (5 km)
- Sussex Airport (23 km)
- Sussex 3 WNW (24 km)
- Charlotteburg Rsvr (26 km)
- Boonton 1 SE (31 km)
- Belvidere Brg (35 km)
- Sussex 8 NNW (36 km)
- Wanaque Raymond Dam (37 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.