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 37143
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 37143 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Kingston Springs, TN, is 5 miles from the ZIP's center: its last spring frost comes after April 13 in half of years and after April 30 in one year in ten. By the USDA's method its plant hardiness zone is 7b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Kingston Springs, TN | 5 mi | 517 ft | April 13 | April 30 | October 25 | 7b |
| Warner Park, TN | 8 mi | 625 ft | April 6 | April 25 | November 1 | – |
| Charlotte, TN | 9 mi | 694 ft | April 11 | April 30 | October 26 | – |
| Fairview, TNFairview Bowie Nat Center | 12 mi | 860 ft | April 7 | April 23 | October 31 | 7b |
| Montgomery Bell State Park, TN | 14 mi | 600 ft | April 16 | May 2 | October 26 | – |
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 Kingston Springs
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 9 | April 30 | April 24 | April 9 | October 16 | October 3 |
| 32°F | April 30 | April 20 | April 13 | March 27 | October 25 | October 12 |
| 28°F (hard freeze) | April 16 | April 7 | April 1 | March 15 | November 4 | October 22 |
| 24°F | April 4 | March 27 | March 19 | February 26 | November 15 | November 1 |
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.