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 36321
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 36321 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Headland, AL, is 11 miles from the ZIP's center: its last spring frost comes after March 5 in half of years and after March 25 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 |
|---|---|---|---|---|---|---|
| Headland, AL | 11 mi | 370 ft | March 5 | March 25 | November 24 | 8b |
| Dothan, ALDothan Regional Airport | 12 mi | 370 ft | March 1 | March 21 | November 24 | 9a |
| Marianna, FLMarianna Municipal Airport | 27 mi | 113 ft | March 1 | March 21 | November 27 | 9a |
| Donalsonville, GA | 27 mi | 150 ft | March 6 | March 25 | November 23 | – |
| Bonifay, FLBonifay Tri County Airport | 31 mi | 85 ft | March 5 | March 25 | November 18 | – |
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 Headland
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 7 | March 30 | March 21 | February 28 | November 11 | October 28 |
| 32°F | March 25 | March 15 | March 5 | February 9 | November 24 | November 6 |
| 28°F (hard freeze) | March 13 | February 28 | February 19 | January 23 | December 9 | November 17 |
| 24°F | March 2 | February 13 | February 1 | January 2 | January 1 | December 3 |
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.