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 76903
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 76903 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, San Angelo, TX, is 8 miles from the ZIP's center: its last spring frost comes after March 20 in half of years and after April 12 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 |
|---|---|---|---|---|---|---|
| San Angelo, TXSan Angelo Mathis Field Airport | 8 mi | 1,890 ft | March 20 | April 12 | November 10 | 8b |
| San Angelo Weather Office, TX | 8 mi | 1,890 ft | March 22 | April 10 | November 10 | – |
| Water Valley, TX | 22 mi | 2,115 ft | April 6 | April 24 | November 2 | 8a |
| Mertzon (12 mi NNW), TX | 26 mi | 2,205 ft | April 1 | April 19 | November 4 | – |
| Robert Lee, TX4 mi WSW | 28 mi | 1,914 ft | March 26 | April 12 | November 7 | 8a |
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 San Angelo
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 25 | April 14 | April 7 | March 18 | November 1 | October 19 |
| 32°F | April 12 | April 1 | March 20 | March 1 | November 10 | October 28 |
| 28°F (hard freeze) | March 30 | March 14 | March 6 | February 17 | November 22 | November 5 |
| 24°F | March 14 | March 3 | February 23 | January 28 | December 3 | November 14 |
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.