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 75028
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 75028 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Grapevine, TX, is 6 miles from the ZIP's center: its last spring frost comes after March 14 in half of years and after April 3 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 |
|---|---|---|---|---|---|---|
| Grapevine, TXGrapevine Dam | 6 mi | 585 ft | March 14 | April 3 | November 17 | 8a |
| Dallas, TXDallas Fort Worth Airport | 10 mi | 560 ft | March 8 | March 26 | November 24 | 8b |
| Denton (2 mi SE), TX | 12 mi | 630 ft | March 13 | March 31 | November 20 | 8b |
| Denton, TXDenton Municipal Airport | 14 mi | 642 ft | March 24 | April 17 | November 7 | 8a |
| Fort Worth, TXFort Worth Alliance Airport | 15 mi | 685 ft | March 12 | April 3 | November 17 | 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 Grapevine
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 15 | April 5 | March 29 | March 8 | November 7 | October 26 |
| 32°F | April 3 | March 23 | March 14 | February 23 | November 17 | November 2 |
| 28°F (hard freeze) | March 20 | March 9 | March 1 | February 4 | November 29 | November 9 |
| 24°F | March 11 | February 24 | February 12 | January 17 | December 13 | 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.