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 01902
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 01902 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Marblehead, MA, is 4 miles from the ZIP's center: its last spring frost comes after April 25 in half of years and after May 13 in one year in ten. By the USDA's method its plant hardiness zone is 6b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Marblehead, MA | 4 mi | 84 ft | April 25 | May 13 | October 20 | 6b |
| Beverly, MABeverly Municipal Airport | 8 mi | 108 ft | April 24 | May 6 | October 17 | 6b |
| Boston, MABoston Logan International Airport | 8 mi | 12 ft | April 4 | April 17 | November 9 | 7a |
| Middleton, MA | 9 mi | 110 ft | May 3 | May 20 | October 9 | 6b |
| Beverly station, MA | 10 mi | 65 ft | May 4 | May 17 | October 12 | – |
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 Marblehead
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 26 | May 17 | May 9 | April 26 | October 9 | September 28 |
| 32°F | May 13 | May 1 | April 25 | April 12 | October 20 | October 5 |
| 28°F (hard freeze) | April 27 | April 17 | April 11 | April 1 | October 31 | October 17 |
| 24°F | April 12 | April 4 | March 31 | March 18 | November 12 | October 28 |
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.