Last spring frost
Mar 26
Frost Dates for Longport, NJ
First fall frost
Nov 22
Growing season
243 days
Hardiness zone
7b
In an average year around Longport, NJ, the last spring frost (32°F) is about Mar 26 and the first fall frost is about Nov 22, giving roughly a 243-day growing season. To be safe most years, wait until Mar 9 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) | Apr 22 | Apr 7 | Mar 24 |
| Freeze (32°F) | Apr 7 | Mar 26 | Mar 9 |
| Hard (28°F) | Mar 28 | Mar 13 | Feb 27 |
| Severe (24°F) | Mar 19 | Mar 3 | Feb 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Apr 17 | Apr 14 | Apr 10 | Apr 7 | Apr 4 | Apr 2 | Mar 30 | Mar 24 |
| 32°F | Apr 7 | Apr 3 | Mar 31 | Mar 29 | Mar 26 | Mar 23 | Mar 19 | Mar 15 | Mar 9 |
| 28°F | Mar 28 | Mar 24 | Mar 19 | Mar 16 | Mar 13 | Mar 10 | Mar 7 | Mar 2 | Feb 27 |
| 24°F | Mar 19 | Mar 13 | Mar 9 | Mar 6 | Mar 3 | Feb 28 | Feb 25 | Feb 18 | Feb 10 |
| 20°F | Mar 8 | Mar 2 | Feb 27 | Feb 22 | Feb 17 | Feb 11 | Feb 6 | Feb 1 | Jan 26 |
| 16°F | Feb 27 | Feb 20 | Feb 13 | Feb 8 | Feb 3 | Jan 31 | Jan 28 | Jan 21 | Jan 11 |
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 29 | Nov 8 | Nov 25 |
| Freeze (32°F) | Nov 7 | Nov 22 | Dec 10 |
| Hard (28°F) | Nov 18 | Dec 5 | Dec 25 |
| Severe (24°F) | Dec 1 | Dec 22 | Jan 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 8 | Nov 12 | Nov 15 | Nov 19 | Nov 25 |
| 32°F | Nov 7 | Nov 12 | Nov 15 | Nov 18 | Nov 22 | Nov 25 | Nov 29 | Dec 3 | Dec 10 |
| 28°F | Nov 18 | Nov 24 | Nov 28 | Dec 1 | Dec 5 | Dec 9 | Dec 14 | Dec 19 | Dec 25 |
| 24°F | Dec 1 | Dec 7 | Dec 12 | Dec 18 | Dec 22 | Dec 26 | Dec 31 | Jan 5 | Jan 12 |
| 20°F | Dec 13 | Dec 23 | Dec 29 | Jan 1 | Jan 5 | Jan 9 | Jan 14 | Jan 21 | Feb 1 |
| 16°F | Dec 28 | Jan 2 | Jan 6 | Jan 11 | Jan 16 | Jan 20 | Jan 26 | Jan 31 | Feb 9 |
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: Margate, Nj, about 2.5 miles away@if(!empty($station['elevation_ft'])), at 16 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 Longport, NJ?
On average, the last spring frost (32°F) around Longport, NJ is about Mar 26. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 9.
When is the first frost in the fall?
The first fall frost around Longport, NJ typically arrives about Nov 22. 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 Mar 26 on average, or Mar 9 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 243 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 08403 Planting calendar → New Jersey frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026