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 77801
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 77801 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, College Station, TX, is 3 miles from the ZIP's center: its last spring frost comes after February 27 in half of years and after March 18 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| College Station, TXCollege Station Easterwood Field | 3 mi | 305 ft | February 27 | March 18 | November 30 | 9a |
| Somerville, TXSomerville Dam | 23 mi | 263 ft | March 18 | April 6 | November 9 | 8b |
| Washington State Park, TX | 25 mi | 215 ft | March 7 | March 31 | November 19 | 9a |
| Franklin, TX | 28 mi | 467 ft | February 28 | March 21 | November 28 | – |
| Brenham, TX | 33 mi | 313 ft | March 2 | March 20 | November 30 | 9a |
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 College Station
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 2 | March 20 | March 11 | February 22 | November 17 | November 1 |
| 32°F | March 18 | March 6 | February 27 | January 31 | November 30 | November 10 |
| 28°F (hard freeze) | March 9 | February 24 | February 7 | January 6 | December 18 | November 23 |
| 24°F | March 1 | February 7 | January 23 | December 21 | January 3 | December 5 |
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.