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 87402
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 87402 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Farmington, NM, is 6 miles from the ZIP's center: its last spring frost comes after May 2 in half of years and after May 18 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 |
|---|---|---|---|---|---|---|
| Farmington, NMFarmington Regional Airport | 6 mi | 5,495 ft | May 2 | May 18 | October 13 | 7a |
| Aztec, NMAztec Ruins National Monument | 9 mi | 5,644 ft | May 12 | May 30 | October 6 | 6b |
| Farmington Agricultural Science Center, NM | 11 mi | 5,625 ft | April 29 | May 13 | October 15 | 7a |
| Fruitland, NM | 12 mi | 5,130 ft | May 12 | May 29 | October 4 | – |
| Bloomfield, NM3 mi SE | 14 mi | 5,806 ft | April 23 | May 7 | October 19 | – |
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 Farmington
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) | June 3 | May 24 | May 18 | May 3 | October 4 | September 22 |
| 32°F | May 18 | May 8 | May 2 | April 20 | October 13 | September 29 |
| 28°F (hard freeze) | May 4 | April 26 | April 20 | April 5 | October 22 | October 6 |
| 24°F | April 21 | April 13 | April 6 | March 15 | November 3 | October 18 |
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.