Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 08270
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 08270 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Belleplain, NJ, is 2 miles from the ZIP's center: its last spring frost comes after April 24 in half of years and after May 18 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Belleplain, NJBelleplain Station Forest | 2 mi | 30 ft | April 24 | May 18 | October 22 | – |
| Estell Manor, NJ | 8 mi | 85 ft | April 24 | May 12 | October 22 | 7a |
| Millville, NJMillville Municipal Airport | 16 mi | 70 ft | April 24 | May 10 | October 23 | 7a |
| Margate, NJ | 17 mi | 16 ft | March 26 | April 7 | November 22 | – |
| Atlantic City, NJAtlantic City International Airport | 18 mi | 60 ft | April 18 | May 5 | October 29 | 7a |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Belleplain
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | May 27 | May 17 | May 7 | April 20 | October 13 | October 1 |
| 32°F | May 18 | May 3 | April 24 | April 5 | October 22 | October 8 |
| 28°F (hard freeze) | May 3 | April 16 | April 6 | March 23 | November 4 | October 20 |
| 24°F | April 11 | April 1 | March 26 | March 9 | November 16 | November 3 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.