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 33909
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 33909 in zone 10b (the coldest night of a typical year: 35 to 40°F).
The nearest station, Fort Myers, FL, is 11 miles from the ZIP's center: a night at 32°F or colder comes there in only 14% of years, and NOAA's median date of the last spring frost is January 16. By the USDA's method its plant hardiness zone is 10b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Fort Myers, FLFort Myers Page Field Airport | 11 mi | 15 ft | January 16 | February 2 | January 13 | 10b |
| Punta Gorda (4 mi ESE), FL | 14 mi | 20 ft | January 21 | February 14 | January 14 | 10a |
| Punta Gorda, FLPunta Gorda Charlotte County Airport | 14 mi | 25 ft | January 22 | February 16 | January 10 | 10a |
| Fort Myers SW Florida Regional Airport, FL | 18 mi | 31 ft | January 17 | February 6 | January 16 | 10a |
| La Belle, FL | 33 mi | 16 ft | February 2 | March 11 | January 8 | – |
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 Fort Myers
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) | February 15 | February 1 | January 21 | December 31 | January 12 | December 23 |
| 32°F | February 2 | January 28 | January 16 | January 1 | January 13 | December 31 |
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.