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 39307
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 39307 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Meridian, MS, is 3 miles from the ZIP's center: its last spring frost comes after March 16 in half of years and after April 3 in one year in ten. By the USDA's method its plant hardiness zone is 8b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Meridian, MSMeridian Key Field | 3 mi | 294 ft | March 16 | April 3 | November 12 | 8b |
| Newton, MS5 mi ENE | 16 mi | 374 ft | March 24 | April 10 | November 5 | 8a |
| Newton Experiment Station, MS | 17 mi | 349 ft | March 25 | April 12 | November 2 | 8a |
| Quitman, MS2 mi NNE | 19 mi | 213 ft | March 18 | April 7 | November 10 | – |
| Meridian Naas, MS | 20 mi | 271 ft | March 14 | April 1 | November 12 | 8b |
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 Meridian
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 17 | April 6 | March 31 | March 12 | November 1 | October 19 |
| 32°F | April 3 | March 23 | March 16 | February 24 | November 12 | October 29 |
| 28°F (hard freeze) | March 21 | March 9 | February 28 | February 1 | November 27 | November 7 |
| 24°F | March 10 | February 24 | February 10 | January 11 | December 18 | November 23 |
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.