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 39406
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 39406 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Hattiesburg (5 mi SW), MS, is 5 miles from the ZIP's center: its last spring frost comes after March 7 in half of years and after March 26 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Hattiesburg (5 mi SW), MS | 5 mi | 385 ft | March 7 | March 26 | November 23 | – |
| Hattiesburg, MSHattiesburg Chain Municipal Airport | 6 mi | 151 ft | March 8 | March 28 | November 15 | 8b |
| Collins, MS | 25 mi | 290 ft | March 17 | April 4 | November 12 | – |
| Beaumont, MSBeaumont Expstation | 25 mi | 194 ft | March 18 | April 6 | November 12 | 8b |
| Laurel, MS | 27 mi | 225 ft | March 12 | 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 Hattiesburg (5 mi SW)
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 12 | March 31 | March 23 | March 2 | November 11 | October 27 |
| 32°F | March 26 | March 15 | March 7 | February 14 | November 23 | November 5 |
| 28°F (hard freeze) | March 16 | March 3 | February 20 | January 26 | December 4 | November 14 |
| 24°F | March 7 | February 20 | February 4 | January 4 | December 30 | December 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.