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 78573
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 78573 in zone 10a (the coldest night of a typical year: 30 to 35°F).
The nearest station, La Joya, TX, is 2 miles from the ZIP's center: its last spring frost comes after January 23 in half of years and after February 27 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| La Joya, TX | 2 mi | 213 ft | January 23 | February 27 | December 28 | – |
| McAllen station, TX | 8 mi | 100 ft | January 9 | February 12 | January 1 | 10a |
| McAllen, TXMcAllen Miller International Airport | 8 mi | 100 ft | January 9 | February 13 | January 3 | 10a |
| Edinburg, TX | 9 mi | 96 ft | January 8 | February 21 | January 2 | – |
| McCook, TX | 22 mi | 220 ft | January 22 | March 5 | December 19 | – |
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 La Joya
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 11 | February 26 | February 11 | January 9 | December 7 | November 18 |
| 32°F | February 27 | February 4 | January 23 | December 22 | December 28 | December 2 |
| 28°F (hard freeze) | February 6 | January 20 | January 7 | December 17 | January 1 | December 13 |
| 24°F | January 31 | January 8 | January 4 | December 17 | January 2 | December 16 |
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.