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 35404
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 35404 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Northport, AL, is 6 miles from the ZIP's center: its last spring frost comes after March 18 in half of years and after April 4 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Northport, AL2 mi S | 6 mi | 150 ft | March 18 | April 4 | November 10 | – |
| Tuscaloosa Acfd, AL | 8 mi | 169 ft | March 12 | April 2 | November 15 | 8b |
| Tuscaloosa, ALTuscaloosa Municipal Airport | 8 mi | 150 ft | March 16 | April 3 | November 12 | 8b |
| Bankhead Lock and Dam, AL | 18 mi | 280 ft | March 20 | April 9 | November 11 | – |
| Centreville, AL6 mi SW | 28 mi | 450 ft | April 2 | April 19 | 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 Northport
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 17 | April 7 | April 1 | March 14 | November 1 | October 20 |
| 32°F | April 4 | March 25 | March 18 | February 26 | November 10 | October 29 |
| 28°F (hard freeze) | March 22 | March 11 | March 3 | February 6 | November 25 | November 6 |
| 24°F | March 13 | February 28 | February 16 | January 16 | December 11 | November 18 |
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.