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 78401
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 78401 in zone 10a (the coldest night of a typical year: 30 to 35°F).
The nearest station, Corpus Christi NWS, TX, is 7 miles from the ZIP's center: its last spring frost comes after January 31 in half of years and after March 2 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Corpus Christi NWS, TX | 7 mi | 44 ft | January 31 | March 2 | December 22 | – |
| Corpus Christi, TXCorpus Christi International Airport | 7 mi | 45 ft | January 28 | February 28 | December 21 | 9b |
| Corpus Christi Cabaniss Field, TX | 7 mi | 30 ft | January 15 | February 23 | December 30 | – |
| C C Botanical Gardens, TX | 9 mi | 16 ft | January 29 | March 1 | December 24 | 9b |
| Corpus Christi Naval Air Station, TX | 11 mi | 18 ft | January 14 | February 20 | January 8 | – |
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 NWS
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 12 | March 1 | February 18 | January 18 | December 7 | November 16 |
| 32°F | March 2 | February 12 | January 31 | December 24 | December 22 | November 29 |
| 28°F (hard freeze) | February 17 | January 30 | January 11 | December 13 | January 1 | December 7 |
| 24°F | February 9 | January 12 | January 5 | 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.