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 30311
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 30311 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Atlanta Fulton County Airport, GA, is 5 miles from the ZIP's center: its last spring frost comes after March 24 in half of years and after April 10 in one year in ten. By the USDA's method its plant hardiness zone is 8a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Atlanta Fulton County Airport, GA | 5 mi | 840 ft | March 24 | April 10 | November 8 | 8a |
| Atlanta, GAAtlanta Hartsfield International Airport | 7 mi | 1,010 ft | March 15 | April 4 | November 20 | 8b |
| Mableton, GA1 mi N | 11 mi | 980 ft | March 27 | April 12 | November 7 | – |
| Chamblee, GAAtlanta Peachtree Airport | 14 mi | 1,002 ft | March 25 | April 12 | November 9 | 8b |
| Jonesboro, GA | 15 mi | 930 ft | March 25 | April 10 | November 12 | 8b |
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 Atlanta Fulton County 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) | April 22 | April 13 | April 7 | March 21 | October 29 | October 17 |
| 32°F | April 10 | March 31 | March 24 | March 2 | November 8 | October 27 |
| 28°F (hard freeze) | March 27 | March 17 | March 9 | February 15 | November 20 | November 4 |
| 24°F | March 15 | February 28 | February 19 | January 22 | December 7 | November 15 |
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.