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 36207
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 36207 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Heflin, AL, is 6 miles from the ZIP's center: its last spring frost comes after April 6 in half of years and after April 22 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 |
|---|---|---|---|---|---|---|
| Heflin, AL | 6 mi | 1,000 ft | April 6 | April 22 | October 31 | 8a |
| Anniston, ALAnniston Metro Airport | 11 mi | 594 ft | March 23 | April 9 | November 9 | 8a |
| Talladega (10 mi NNE), AL | 22 mi | 525 ft | March 26 | April 14 | November 4 | – |
| Ashland, AL3 mi ENE | 27 mi | 1,022 ft | April 4 | April 19 | November 1 | 8a |
| Gadsden, AL | 28 mi | 565 ft | March 19 | April 7 | November 13 | – |
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 Heflin
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) | May 4 | April 26 | April 20 | April 4 | October 22 | October 9 |
| 32°F | April 22 | April 13 | April 6 | March 20 | October 31 | October 19 |
| 28°F (hard freeze) | April 10 | April 2 | March 25 | March 2 | November 9 | October 27 |
| 24°F | March 31 | March 20 | March 11 | February 14 | November 22 | November 5 |
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.