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 10603
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 10603 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Westchester County Airport, NY, is 4 miles from the ZIP's center: its last spring frost comes after April 12 in half of years and after April 27 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 |
|---|---|---|---|---|---|---|
| Westchester County Airport, NY | 4 mi | 379 ft | April 12 | April 27 | October 31 | 7a |
| Dobbs Ferry, NYDobbs Ferry-Ardsley | 4 mi | 200 ft | April 20 | May 6 | October 26 | 7a |
| Stamford, CT5 mi N | 13 mi | 190 ft | April 17 | May 2 | October 23 | 6b |
| Yorktown Heights, NYYorktown Hts (1 mi W) | 15 mi | 670 ft | April 25 | May 8 | October 19 | 6b |
| Bronx, NY | 15 mi | 39 ft | April 1 | April 12 | November 16 | – |
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 Westchester County 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 11 | May 2 | April 26 | April 13 | October 18 | October 2 |
| 32°F | April 27 | April 18 | April 12 | April 1 | October 31 | October 15 |
| 28°F (hard freeze) | April 13 | April 5 | April 1 | March 18 | November 13 | October 29 |
| 24°F | April 3 | March 28 | March 21 | March 6 | November 25 | November 10 |
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.