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 27406
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 27406 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Greensboro Water Treatment Plant, NC, is 6 miles from the ZIP's center: its last spring frost comes after April 1 in half of years and after April 14 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Greensboro Water Treatment Plant, NC | 6 mi | 765 ft | April 1 | April 14 | November 4 | – |
| High Point, NC | 12 mi | 900 ft | March 30 | April 15 | November 5 | 7b |
| Greensboro, NCPiedmont Triad International Airport | 12 mi | 890 ft | March 30 | April 14 | November 5 | 8a |
| Randleman, NC | 12 mi | 810 ft | March 29 | April 13 | November 6 | – |
| Burlington, NCBurlington Alamance Airport | 17 mi | 617 ft | April 1 | April 17 | November 2 | 8a |
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 Greensboro Water Treatment Plant
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) | April 27 | April 17 | April 12 | March 30 | October 27 | October 14 |
| 32°F | April 14 | April 5 | April 1 | March 18 | November 4 | October 23 |
| 28°F (hard freeze) | April 5 | March 28 | March 22 | March 3 | November 15 | November 1 |
| 24°F | March 25 | March 17 | March 8 | February 17 | November 30 | November 12 |
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.