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 30022
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 30022 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Chamblee, GA, is 11 miles from the ZIP's center: its last spring frost comes after March 25 in half of years and after April 12 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 |
|---|---|---|---|---|---|---|
| Chamblee, GAAtlanta Peachtree Airport | 11 mi | 1,002 ft | March 25 | April 12 | November 9 | 8b |
| Cumming, GA2 mi N | 16 mi | 1,140 ft | April 4 | April 19 | November 4 | – |
| Mableton, GA1 mi N | 22 mi | 980 ft | March 27 | April 12 | November 7 | – |
| Atlanta Fulton County Airport, GA | 23 mi | 840 ft | March 24 | April 10 | November 8 | 8a |
| Dallas, GA7 mi NE | 29 mi | 1,028 ft | April 2 | April 19 | November 4 | 8a |
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 Chamblee
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 14 | April 7 | March 21 | October 29 | October 17 |
| 32°F | April 12 | April 1 | March 25 | March 5 | November 9 | October 26 |
| 28°F (hard freeze) | March 31 | March 20 | March 12 | February 18 | November 22 | November 4 |
| 24°F | March 17 | March 5 | February 23 | January 26 | 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.