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 29902
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 29902 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Beaufort Wastewater Treatment Plant, SC, is 5 miles from the ZIP's center: its last spring frost comes after March 3 in half of years and after March 20 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Beaufort Wastewater Treatment Plant, SC | 5 mi | 25 ft | March 3 | March 20 | December 9 | – |
| Beaufort, SCBeaufort Marine Corps Air Station | 12 mi | 37 ft | February 28 | March 21 | December 3 | 9a |
| Edisto Beach, SCEdisto Beach State Park | 26 mi | 5 ft | March 1 | March 21 | December 6 | – |
| Yemassee, SC1 mi N | 28 mi | 44 ft | March 23 | April 11 | November 6 | 8a |
| Edisto Island Middleton Plantation, SC | 29 mi | 12 ft | March 1 | March 22 | December 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 Beaufort Wastewater 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 1 | March 22 | March 16 | February 27 | November 26 | November 10 |
| 32°F | March 20 | March 9 | March 3 | February 2 | December 9 | November 21 |
| 28°F (hard freeze) | March 11 | February 26 | February 9 | January 9 | December 28 | December 3 |
| 24°F | February 26 | February 4 | January 26 | December 29 | January 7 | December 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.