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 29941
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 29941 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Beaufort, SC, is 7 miles from the ZIP's center: its last spring frost comes after February 28 in half of years and after March 21 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Beaufort, SCBeaufort Marine Corps Air Station | 7 mi | 37 ft | February 28 | March 21 | December 3 | 9a |
| Yemassee, SC1 mi N | 12 mi | 44 ft | March 23 | April 11 | November 6 | 8a |
| Beaufort Wastewater Treatment Plant, SC | 12 mi | 25 ft | March 3 | March 20 | December 9 | – |
| Walterboro, SC1 mi SW | 26 mi | 56 ft | March 19 | April 9 | November 12 | – |
| Hampton, SC1 mi S | 28 mi | 95 ft | March 6 | March 26 | November 26 | – |
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 Beaufort
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) | March 31 | March 22 | March 14 | February 22 | November 18 | November 4 |
| 32°F | March 21 | March 10 | February 28 | February 2 | December 3 | November 14 |
| 28°F (hard freeze) | March 8 | February 22 | February 8 | January 8 | December 27 | December 1 |
| 24°F | February 27 | February 5 | January 27 | December 28 | January 7 | December 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.