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 36619
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 36619 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Mobile, AL, is 6 miles from the ZIP's center: its last spring frost comes after March 3 in half of years and after March 21 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Mobile, ALMobile Regional Airport | 6 mi | 208 ft | March 3 | March 21 | November 25 | 9a |
| Mobile Downtown Airport, AL | 8 mi | 26 ft | February 21 | March 15 | December 6 | 9a |
| Coden, AL | 15 mi | 12 ft | March 13 | April 2 | November 24 | 9a |
| Fairhope (2 mi NE), AL | 19 mi | 23 ft | March 10 | March 30 | November 17 | – |
| Fairhope, AL3 mi NE | 19 mi | 95 ft | March 15 | April 2 | November 19 | – |
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 Mobile
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 5 | March 25 | March 17 | February 26 | November 13 | October 30 |
| 32°F | March 21 | March 12 | March 3 | February 6 | November 25 | November 8 |
| 28°F (hard freeze) | March 13 | February 28 | February 13 | January 17 | December 14 | November 17 |
| 24°F | March 2 | February 9 | January 30 | December 31 | January 3 | December 4 |
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.