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 24061
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 24061 in zone 7a (the coldest night of a typical year: 0 to 5°F).
The nearest station, Blacksburg, VA, is 2 miles from the ZIP's center: its last spring frost comes after April 24 in half of years and after May 14 in one year in ten. By the USDA's method its plant hardiness zone is 7a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Blacksburg, VABlacksburg Nwso | 2 mi | 2,103 ft | April 24 | May 14 | October 19 | 7a |
| Christiansburg, VA | 7 mi | 2,100 ft | April 19 | May 9 | October 23 | 7a |
| Radford, VA3 mi N | 9 mi | 1,800 ft | April 26 | May 16 | October 18 | – |
| Pearisburg, VA4 mi SSE | 15 mi | 1,678 ft | April 27 | May 16 | October 17 | 7a |
| Copper Hill, VA | 19 mi | 2,846 ft | April 21 | May 10 | October 25 | 7a |
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 Blacksburg
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) | May 24 | May 14 | May 6 | April 21 | October 8 | September 26 |
| 32°F | May 14 | May 1 | April 24 | April 11 | October 19 | October 6 |
| 28°F (hard freeze) | April 27 | April 17 | April 11 | March 28 | October 29 | October 15 |
| 24°F | April 13 | April 4 | March 30 | March 14 | November 5 | October 24 |
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.