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 71901
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 71901 in zone 8a (the coldest night of a typical year: 10 to 15°F).
The nearest station, Hot Springs (1 mi NNE), AR, is 4 miles from the ZIP's center: its last spring frost comes after March 19 in half of years and after April 7 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Hot Springs (1 mi NNE), AR | 4 mi | 626 ft | March 19 | April 7 | November 13 | – |
| Malvern, AR | 12 mi | 300 ft | March 31 | April 16 | November 5 | 8a |
| Blakely Mountain Dam, AR | 13 mi | 426 ft | April 3 | April 20 | November 4 | 8a |
| Hot Springs, ARHot Springs Asos | 17 mi | 535 ft | March 24 | April 13 | November 9 | 8a |
| Alum Fork, AR | 20 mi | 698 ft | March 28 | April 12 | November 8 | 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 Hot Springs (1 mi NNE)
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 19 | April 9 | April 2 | March 14 | November 3 | October 19 |
| 32°F | April 7 | March 28 | March 19 | March 1 | November 13 | October 28 |
| 28°F (hard freeze) | March 26 | March 13 | March 6 | February 13 | November 27 | November 7 |
| 24°F | March 11 | March 2 | February 21 | January 26 | December 12 | November 17 |
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.