Last spring frost
Apr 1
Frost Dates for Stone Harbor, NJ
First fall frost
Nov 9
Growing season
222 days
Hardiness zone
7b
In an average year around Stone Harbor, NJ, the last spring frost (32°F) is about Apr 1 and the first fall frost is about Nov 9, giving roughly a 222-day growing season. To be safe most years, wait until Mar 19 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 2 | Apr 17 | Apr 3 |
| Freeze (32°F) | Apr 15 | Apr 1 | Mar 19 |
| Hard (28°F) | Mar 31 | Mar 19 | Mar 4 |
| Severe (24°F) | Mar 23 | Mar 9 | Feb 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 27 | Apr 23 | Apr 19 | Apr 17 | Apr 14 | Apr 10 | Apr 7 | Apr 3 |
| 32°F | Apr 15 | Apr 10 | Apr 7 | Apr 4 | Apr 1 | Mar 30 | Mar 28 | Mar 24 | Mar 19 |
| 28°F | Mar 31 | Mar 29 | Mar 26 | Mar 23 | Mar 19 | Mar 17 | Mar 14 | Mar 10 | Mar 4 |
| 24°F | Mar 23 | Mar 18 | Mar 15 | Mar 12 | Mar 9 | Mar 5 | Mar 2 | Feb 26 | Feb 20 |
| 20°F | Mar 14 | Mar 9 | Mar 5 | Mar 1 | Feb 26 | Feb 21 | Feb 15 | Feb 10 | Feb 2 |
| 16°F | Mar 3 | Feb 26 | Feb 20 | Feb 13 | Feb 7 | Feb 3 | Jan 31 | Jan 25 | Jan 15 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 13 | Oct 29 | Nov 11 |
| Freeze (32°F) | Oct 26 | Nov 9 | Nov 26 |
| Hard (28°F) | Nov 7 | Nov 23 | Dec 11 |
| Severe (24°F) | Nov 18 | Dec 6 | Dec 26 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 13 | Oct 19 | Oct 23 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 11 |
| 32°F | Oct 26 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 12 | Nov 15 | Nov 19 | Nov 26 |
| 28°F | Nov 7 | Nov 12 | Nov 16 | Nov 20 | Nov 23 | Nov 27 | Nov 30 | Dec 4 | Dec 11 |
| 24°F | Nov 18 | Nov 24 | Nov 29 | Dec 3 | Dec 6 | Dec 10 | Dec 15 | Dec 19 | Dec 26 |
| 20°F | Dec 1 | Dec 8 | Dec 15 | Dec 19 | Dec 24 | Dec 28 | Jan 2 | Jan 8 | Jan 17 |
| 16°F | Dec 16 | Dec 24 | Jan 1 | Jan 4 | Jan 8 | Jan 12 | Jan 18 | Jan 25 | Feb 3 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Cape May 2 Nw, Nj, about 10.4 miles away@if(!empty($station['elevation_ft'])), at 20 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Stone Harbor, NJ?
On average, the last spring frost (32°F) around Stone Harbor, NJ is about Apr 1. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 19.
When is the first frost in the fall?
The first fall frost around Stone Harbor, NJ typically arrives about Nov 9. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 1 on average, or Mar 19 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 222 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 08247 Planting calendar → New Jersey frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026