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 02637
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 02637 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Hyannis Barnstable Municipal Airport, MA, is 3 miles from the ZIP's center: its last spring frost comes after April 22 in half of years and after May 5 in one year in ten. By the USDA's method its plant hardiness zone is 7a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Hyannis Barnstable Municipal Airport, MA | 3 mi | 55 ft | April 22 | May 5 | October 28 | 7a |
| Barnstable, MAHyannis | 3 mi | 60 ft | April 16 | April 30 | October 30 | 7a |
| West Harwich, MA | 9 mi | 15 ft | April 13 | April 26 | November 3 | – |
| East Sandwich, MA | 10 mi | 150 ft | April 26 | May 9 | October 26 | – |
| Chatham, MAChatham Municipal Airport | 14 mi | 68 ft | April 13 | April 26 | November 4 | 7b |
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 Hyannis Barnstable Municipal Airport
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 16 | May 7 | May 3 | April 22 | October 14 | October 1 |
| 32°F | May 5 | April 27 | April 22 | April 9 | October 28 | October 13 |
| 28°F (hard freeze) | April 21 | April 13 | April 7 | March 23 | November 9 | October 25 |
| 24°F | April 6 | March 31 | March 24 | March 9 | November 25 | November 8 |
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.