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 29646
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 29646 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Greenwood station, SC, is 5 miles from the ZIP's center: its last spring frost comes after March 26 in half of years and after April 10 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Greenwood station, SC | 5 mi | 615 ft | March 26 | April 10 | November 12 | – |
| Greenwood, SCGreenwood County Airport | 8 mi | 631 ft | April 1 | April 18 | November 2 | 8a |
| Greenwood (8 mi NE), SC | 10 mi | 530 ft | March 22 | April 8 | November 13 | – |
| Lake Greenwood, SC | 14 mi | 422 ft | April 1 | April 16 | November 4 | – |
| McCormick, SC | 17 mi | 507 ft | March 28 | April 13 | 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 Greenwood station
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 20 | April 12 | April 6 | March 19 | November 1 | October 18 |
| 32°F | April 10 | April 1 | March 26 | March 3 | November 12 | October 28 |
| 28°F (hard freeze) | March 31 | March 20 | March 12 | February 14 | November 25 | November 6 |
| 24°F | March 17 | March 5 | February 22 | January 27 | December 12 | November 19 |
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.