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 70508
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 70508 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Lafayette, LA, is 4 miles from the ZIP's center: its last spring frost comes after February 13 in half of years and after March 10 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 |
|---|---|---|---|---|---|---|
| Lafayette, LALafayette Regional Airport | 4 mi | 38 ft | February 13 | March 10 | December 4 | 9a |
| Lafayette station, LA | 5 mi | 25 ft | February 26 | March 20 | November 28 | – |
| Lafayette (13 mi SE), LA | 10 mi | 35 ft | February 19 | March 16 | December 1 | 9a |
| St. Martinville, LASt Martinville (3 mi SW) | 11 mi | 30 ft | February 21 | March 17 | November 27 | 9a |
| New Iberia Acadiana Airport, LA | 12 mi | 24 ft | February 10 | March 9 | December 11 | – |
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 Lafayette
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) | March 25 | March 12 | March 3 | February 1 | November 20 | November 4 |
| 32°F | March 10 | February 26 | February 13 | January 13 | December 4 | November 13 |
| 28°F (hard freeze) | February 28 | February 5 | January 27 | December 29 | December 30 | December 1 |
| 24°F | February 11 | January 28 | January 17 | December 24 | January 6 | December 13 |
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.