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 31820
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 31820 in zone 8b (the coldest night of a typical year: 15 to 20°F).
The nearest station, Columbus #2, GA, is 7 miles from the ZIP's center: its last spring frost comes after March 21 in half of years and after April 9 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Columbus #2, GA | 7 mi | 435 ft | March 21 | April 9 | November 11 | – |
| Columbus, GAColumbus Metropolitan Airport | 8 mi | 392 ft | March 5 | March 24 | November 23 | 8b |
| Mulberry Grove, GA | 15 mi | 501 ft | March 21 | April 13 | November 18 | – |
| Fort Benning Lawson Field, GA | 19 mi | 289 ft | March 26 | April 13 | November 8 | – |
| Talbotton, GA | 19 mi | 620 ft | April 1 | April 16 | November 3 | 8a |
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 Columbus #2
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 19 | April 10 | April 3 | March 16 | November 3 | October 22 |
| 32°F | April 9 | March 29 | March 21 | February 28 | November 11 | October 31 |
| 28°F (hard freeze) | March 26 | March 15 | March 6 | February 12 | November 24 | November 6 |
| 24°F | March 16 | March 2 | February 20 | January 24 | December 12 | November 18 |
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.