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 78402
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 78402 in zone 10a (the coldest night of a typical year: 30 to 35°F).
The nearest station, Corpus Christi, TX, is 6 miles from the ZIP's center: its last spring frost comes after January 28 in half of years and after February 28 in one year in ten. By the USDA's method its plant hardiness zone is 9b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Corpus Christi, TXCorpus Christi International Airport | 6 mi | 45 ft | January 28 | February 28 | December 21 | 9b |
| Corpus Christi NWS, TX | 6 mi | 44 ft | January 31 | March 2 | December 22 | – |
| Corpus Christi Cabaniss Field, TX | 10 mi | 30 ft | January 15 | February 23 | December 30 | – |
| C C Botanical Gardens, TX | 13 mi | 16 ft | January 29 | March 1 | December 24 | 9b |
| Robstown, TX | 14 mi | 85 ft | January 26 | March 3 | December 24 | 9b |
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 Corpus Christi
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 28 | February 16 | January 19 | December 5 | November 13 |
| 32°F | February 28 | February 10 | January 28 | December 16 | December 21 | November 25 |
| 28°F (hard freeze) | February 16 | January 30 | January 8 | December 11 | December 30 | December 5 |
| 24°F | February 5 | January 15 | January 2 | December 12 | January 1 | December 11 |
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.