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 03766
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 03766 in zone 5a (the coldest night of a typical year: -20 to -15°F).
The nearest station, Lebanon, NH, is 4 miles from the ZIP's center: its last spring frost comes after May 9 in half of years and after May 24 in one year in ten. By the USDA's method its plant hardiness zone is 5a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Lebanon, NHLebanon Municipal Airport | 4 mi | 598 ft | May 9 | May 24 | October 6 | 5a |
| Hanover, NH | 6 mi | 584 ft | May 1 | May 15 | October 13 | 5a |
| North Hartland, VTNorth Hartland Lake | 7 mi | 570 ft | May 8 | May 22 | October 6 | – |
| Union Village Dam, VT | 11 mi | 460 ft | May 9 | May 22 | October 2 | 5a |
| Woodstock, VT | 14 mi | 600 ft | May 13 | May 27 | October 1 | 5a |
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 Lebanon
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 6 | May 29 | May 22 | May 7 | September 26 | September 12 |
| 32°F | May 24 | May 16 | May 9 | April 27 | October 6 | September 23 |
| 28°F (hard freeze) | May 11 | May 3 | April 29 | April 17 | October 15 | October 3 |
| 24°F | April 30 | April 22 | April 17 | April 4 | October 28 | October 13 |
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.