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 37128
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 37128 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Christiana, TN, is 7 miles from the ZIP's center: its last spring frost comes after April 14 in half of years and after April 30 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Christiana, TN5 mi W | 7 mi | 750 ft | April 14 | April 30 | October 25 | – |
| Smyrna, TN6 mi S | 9 mi | 550 ft | April 13 | May 4 | October 21 | – |
| Murfreesboro, TN5 mi N | 10 mi | 535 ft | April 9 | April 26 | October 27 | 7b |
| Gladeville, TN | 18 mi | 600 ft | April 16 | April 30 | October 21 | 7a |
| Brentwood, TN | 21 mi | 707 ft | April 15 | May 4 | 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 Christiana
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 12 | May 1 | April 26 | April 12 | October 17 | October 3 |
| 32°F | April 30 | April 21 | April 14 | March 31 | October 25 | October 11 |
| 28°F (hard freeze) | April 18 | April 8 | April 2 | March 14 | November 2 | October 21 |
| 24°F | April 7 | March 29 | March 21 | February 28 | November 14 | 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.