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 33815
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 33815 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Lakeland, FL, is 4 miles from the ZIP's center: its last spring frost comes after January 26 in half of years and after February 21 in one year in ten. By the USDA's method its plant hardiness zone is 9b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Lakeland, FLLakeland 2 | 4 mi | 139 ft | January 26 | February 21 | January 9 | 9b |
| Plant City, FL | 9 mi | 110 ft | January 30 | March 2 | January 6 | 9b |
| Bartow, FL1 mi SE | 15 mi | 111 ft | January 24 | February 20 | January 7 | 10a |
| Winter Haven, FLWinter Haven Gilbert Airport | 15 mi | 146 ft | January 15 | February 7 | January 10 | 10a |
| Winter Haven station, FL | 16 mi | 145 ft | January 16 | February 15 | January 9 | – |
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 Lakeland
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) | March 8 | February 20 | February 8 | January 11 | December 30 | December 3 |
| 32°F | February 21 | February 3 | January 26 | January 2 | January 9 | December 20 |
| 28°F (hard freeze) | February 5 | January 26 | January 17 | December 30 | January 13 | December 28 |
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.