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 03060
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 03060 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Nashua, NH, is 1 miles from the ZIP's center: its last spring frost comes after April 29 in half of years and after May 11 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Nashua, NHNashua Cwsu | 1 mi | 180 ft | April 29 | May 11 | October 8 | – |
| Nashua (2 mi NNW), NH | 4 mi | 135 ft | April 30 | May 11 | October 12 | 6a |
| Hudson, NH1 mi SSE | 4 mi | 185 ft | May 3 | May 16 | October 8 | 5b |
| Lowell, MA | 8 mi | 110 ft | April 30 | May 10 | October 10 | 6b |
| East Milford, NH | 10 mi | 240 ft | April 28 | May 12 | October 8 | – |
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 Nashua
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 23 | May 16 | May 10 | April 29 | October 1 | September 21 |
| 32°F | May 11 | May 3 | April 29 | April 16 | October 8 | September 28 |
| 28°F (hard freeze) | April 28 | April 21 | April 16 | April 3 | October 20 | October 6 |
| 24°F | April 16 | April 9 | April 4 | March 22 | November 2 | October 15 |
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.