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 29301
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 29301 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Spartanburg, SC, is 6 miles from the ZIP's center: its last spring frost comes after April 8 in half of years and after April 23 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 |
|---|---|---|---|---|---|---|
| Spartanburg, SC3 mi SSE | 6 mi | 610 ft | April 8 | April 23 | November 1 | 8a |
| Greenville, SCGrnvl Spart International Airport | 12 mi | 940 ft | March 28 | April 14 | November 7 | 8a |
| Chesnee, SC7 mi WSW | 12 mi | 748 ft | April 13 | April 27 | October 26 | 7b |
| Greenville Downtown Airport, SC | 20 mi | 1,048 ft | March 16 | April 2 | November 20 | 8b |
| Greenville station, SC | 21 mi | 960 ft | March 28 | April 12 | November 7 | – |
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 Spartanburg
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 7 | April 27 | April 21 | April 5 | October 22 | October 10 |
| 32°F | April 23 | April 14 | April 8 | March 20 | November 1 | October 17 |
| 28°F (hard freeze) | April 10 | March 31 | March 24 | March 3 | November 11 | October 29 |
| 24°F | March 28 | March 18 | March 9 | February 15 | November 27 | November 8 |
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.