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 75068
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 75068 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Denton (2 mi SE), TX, is 9 miles from the ZIP's center: its last spring frost comes after March 13 in half of years and after March 31 in one year in ten. By the USDA's method its plant hardiness zone is 8b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Denton (2 mi SE), TX | 9 mi | 630 ft | March 13 | March 31 | November 20 | 8b |
| Pilot Point, TXPilot Point Island Du Boi | 13 mi | 690 ft | March 24 | April 13 | November 16 | – |
| Denton, TXDenton Municipal Airport | 14 mi | 642 ft | March 24 | April 17 | November 7 | 8a |
| Grapevine, TXGrapevine Dam | 17 mi | 585 ft | March 14 | April 3 | November 17 | 8a |
| Richardson, TX | 17 mi | 678 ft | March 7 | March 29 | November 21 | – |
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 Denton (2 mi SE)
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 16 | April 4 | March 28 | March 8 | November 10 | October 26 |
| 32°F | March 31 | March 21 | March 13 | February 24 | November 20 | November 3 |
| 28°F (hard freeze) | March 18 | March 8 | March 1 | February 6 | December 1 | November 11 |
| 24°F | March 10 | February 28 | February 15 | January 16 | December 18 | November 24 |
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.