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 75503
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 75503 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Texarkana, TX, is 7 miles from the ZIP's center: its last spring frost comes after March 15 in half of years and after April 4 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 |
|---|---|---|---|---|---|---|
| Texarkana, TX | 7 mi | 390 ft | March 15 | April 4 | November 17 | 8b |
| Ashdown, AR4 mi SSE | 7 mi | 320 ft | March 24 | April 8 | November 11 | – |
| Texarkana, ARTexarkana Webb Field | 9 mi | 361 ft | March 13 | April 3 | November 13 | 8b |
| Wright Patman Dam & Lake, TX | 15 mi | 282 ft | March 4 | March 24 | November 21 | 8b |
| Atlanta, TX | 27 mi | 315 ft | March 19 | April 6 | November 11 | 8b |
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 Texarkana
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 16 | April 6 | March 30 | March 8 | November 6 | October 24 |
| 32°F | April 4 | March 24 | March 15 | February 24 | November 17 | November 1 |
| 28°F (hard freeze) | March 21 | March 9 | March 1 | February 3 | December 1 | November 10 |
| 24°F | March 8 | February 23 | February 10 | January 14 | December 19 | November 23 |
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.