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 37022
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 37022 in zone 7b (the coldest night of a typical year: 5 to 10°F).
The nearest station, Bethpage, TN, is 4 miles from the ZIP's center: its last spring frost comes after April 16 in half of years and after May 2 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 |
|---|---|---|---|---|---|---|
| Bethpage, TN1 mi S | 4 mi | 560 ft | April 16 | May 2 | October 23 | 7a |
| Hartsville/Trousdale County, TNHartsville | 12 mi | 511 ft | April 12 | April 29 | October 26 | – |
| Portland, TNPortland Sewage Plant | 13 mi | 794 ft | April 5 | April 19 | November 1 | 7b |
| Lebanon (7 mi N), TN | 15 mi | 510 ft | April 10 | April 29 | October 30 | – |
| Lafayette, TN | 16 mi | 975 ft | April 3 | April 21 | November 1 | 7b |
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 Bethpage
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 11 | May 3 | April 28 | April 13 | October 15 | October 3 |
| 32°F | May 2 | April 22 | April 16 | March 31 | October 23 | October 10 |
| 28°F (hard freeze) | April 20 | April 9 | April 3 | March 17 | October 31 | October 18 |
| 24°F | April 8 | March 31 | March 24 | March 3 | November 10 | October 27 |
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.