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 31601
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 31601 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Valdosta, GA, is 3 miles from the ZIP's center: its last spring frost comes after March 10 in half of years and after March 31 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Valdosta, GAValdosta Regional Airport | 3 mi | 198 ft | March 10 | March 31 | November 21 | 9a |
| Valdosta (2 mi S), GA | 4 mi | 265 ft | March 5 | March 23 | November 27 | – |
| Quitman, GA2 mi NW | 14 mi | 185 ft | March 11 | March 31 | November 18 | – |
| Madison, FL | 22 mi | 120 ft | March 5 | March 23 | November 29 | 9a |
| Jasper, FL | 29 mi | 147 ft | March 11 | March 30 | November 22 | 9a |
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 Valdosta
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 14 | April 2 | March 25 | March 2 | November 10 | October 26 |
| 32°F | March 31 | March 19 | March 10 | February 15 | November 21 | November 3 |
| 28°F (hard freeze) | March 14 | March 1 | February 20 | January 24 | December 7 | November 16 |
| 24°F | February 27 | February 10 | January 31 | January 4 | December 31 | 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.