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 30904
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 30904 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Augusta Daniel Field Airport, GA, is 2 miles from the ZIP's center: its last spring frost comes after February 27 in half of years and after March 19 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 |
|---|---|---|---|---|---|---|
| Augusta Daniel Field Airport, GA | 2 mi | 423 ft | February 27 | March 19 | December 4 | 9a |
| Augusta, GAAugusta Bush Field Airport | 8 mi | 132 ft | March 23 | April 9 | November 9 | 8b |
| Graniteville, SC1.2 mi NE | 15 mi | 298 ft | April 9 | April 23 | November 1 | – |
| Clarks Hill, SC1 mi W | 16 mi | 400 ft | March 15 | April 3 | November 18 | – |
| Aiken (5 mi SE), SC | 18 mi | 492 ft | March 21 | April 6 | 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 Augusta Daniel Field Airport
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 30 | March 20 | March 13 | February 22 | November 19 | November 4 |
| 32°F | March 19 | March 6 | February 27 | February 4 | December 4 | November 15 |
| 28°F (hard freeze) | March 6 | February 20 | February 8 | January 10 | December 26 | November 30 |
| 24°F | February 22 | February 3 | January 26 | December 30 | January 6 | 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.