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 30622
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 30622 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, U Of Ga Plant Science, GA, is 3 miles from the ZIP's center: its last spring frost comes after March 27 in half of years and after April 12 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 |
|---|---|---|---|---|---|---|
| U Of Ga Plant Science, GA | 3 mi | 840 ft | March 27 | April 12 | November 8 | 8a |
| Winder, GA4 mi S | 11 mi | 889 ft | April 3 | April 17 | November 7 | – |
| Athens, GAAthens Ben Epps Airport | 12 mi | 785 ft | March 23 | April 10 | November 10 | 8b |
| Watkinsville, GA5 mi SSE | 12 mi | 741 ft | March 24 | April 12 | November 12 | 8b |
| Winterville, GA | 14 mi | 890 ft | April 2 | April 16 | November 2 | 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 U Of Ga Plant Science
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 23 | October 29 | October 18 |
| 32°F | April 12 | April 3 | March 27 | March 5 | November 8 | October 26 |
| 28°F (hard freeze) | March 31 | March 19 | March 12 | February 17 | November 22 | November 4 |
| 24°F | March 19 | March 6 | February 25 | January 25 | December 8 | November 14 |
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.