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 29505
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 29505 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Florence, SC, is 4 miles from the ZIP's center: its last spring frost comes after March 19 in half of years and after April 5 in one year in ten. By the USDA's method its plant hardiness zone is 8b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Florence, SCFlorence Regional Airport | 4 mi | 146 ft | March 19 | April 5 | November 13 | 8b |
| Florence (8 mi NE), SC | 12 mi | 120 ft | March 22 | April 8 | November 10 | – |
| Darlington, SC | 16 mi | 150 ft | March 30 | April 13 | November 6 | 8b |
| Marion, SC | 17 mi | 75 ft | March 22 | April 13 | November 11 | – |
| Lake City, SC2 mi SE | 19 mi | 75 ft | March 20 | April 5 | November 13 | – |
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 Florence
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 16 | April 7 | April 1 | March 14 | November 4 | October 23 |
| 32°F | April 5 | March 27 | March 19 | February 28 | November 13 | November 1 |
| 28°F (hard freeze) | March 26 | March 12 | March 4 | February 6 | November 27 | November 9 |
| 24°F | March 13 | February 28 | February 15 | January 14 | December 15 | November 21 |
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.