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 75401
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 75401 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Greenville, TX, is 2 miles from the ZIP's center: its last spring frost comes after March 18 in half of years and after April 6 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Greenville, TXGreenville KGVL Radio | 2 mi | 545 ft | March 18 | April 6 | November 16 | – |
| Lavon, TXLavon Dam | 24 mi | 510 ft | March 10 | March 31 | November 19 | – |
| Lake Tawakoni, TX | 27 mi | 448 ft | March 16 | April 5 | November 14 | 8b |
| McKinney, TXMcKinney Municipal Airport | 28 mi | 580 ft | March 18 | April 7 | November 11 | 8a |
| McKinney Municipal Airport, TX | 28 mi | 586 ft | March 17 | April 5 | November 15 | – |
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 Greenville
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 23 | April 9 | April 1 | March 13 | November 5 | October 22 |
| 32°F | April 6 | March 26 | March 18 | February 27 | November 16 | November 1 |
| 28°F (hard freeze) | March 23 | March 12 | March 4 | February 10 | November 28 | November 7 |
| 24°F | March 13 | March 2 | February 18 | January 19 | December 12 | November 19 |
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.