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 27409
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 27409 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Greensboro, NC, is 2 miles from the ZIP's center: its last spring frost comes after March 30 in half of years and after April 14 in one year in ten. By the USDA's method its plant hardiness zone is 8a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Greensboro, NCPiedmont Triad International Airport | 2 mi | 890 ft | March 30 | April 14 | November 5 | 8a |
| High Point, NC | 7 mi | 900 ft | March 30 | April 15 | November 5 | 7b |
| Greensboro Water Treatment Plant, NC | 9 mi | 765 ft | April 1 | April 14 | November 4 | – |
| Winston-Salem, NCWinston Salem Rynlds Airport | 15 mi | 970 ft | March 26 | April 11 | November 9 | 8a |
| Randleman, NC | 20 mi | 810 ft | March 29 | April 13 | November 6 | – |
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
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 18 | April 13 | March 29 | October 27 | October 14 |
| 32°F | April 14 | April 5 | March 30 | March 12 | November 5 | October 25 |
| 28°F (hard freeze) | April 4 | March 26 | March 18 | February 28 | November 17 | November 3 |
| 24°F | March 25 | March 15 | March 4 | February 10 | December 2 | November 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.