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 34101
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 34101 in zone 10b (the coldest night of a typical year: 35 to 40°F).
The nearest station, Naples station, FL, is 10 miles from the ZIP's center: a night at 32°F or colder comes there in only 33% of years, and NOAA's median date of the last spring frost is January 18. 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 |
|---|---|---|---|---|---|---|
| Naples station, FL | 10 mi | 40 ft | January 18 | February 16 | January 11 | 10b |
| Everglades station, FL | 28 mi | 5 ft | January 16 | February 3 | January 14 | – |
| Everglades, FLEverglades City (5 mi NE) | 31 mi | 4 ft | January 24 | February 14 | January 20 | – |
| Fort Myers SW Florida Regional Airport, FL | 34 mi | 31 ft | January 17 | February 6 | January 16 | 10a |
| Immokalee, FL | 35 mi | 35 ft | January 23 | February 18 | January 11 | – |
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 Naples station
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 2 | February 9 | January 31 | January 3 | January 10 | December 19 |
| 32°F | February 16 | January 31 | January 18 | December 31 | January 11 | December 27 |
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.