Florida Frost Dates & Growing Zones by City
So far we cover one Florida city with frost dates, Jacksonville. Its typical (50%) last spring frost is Feb 1, and its typical frost-free season is 330 days.
On the 2023 USDA hardiness map, these cities fall in zones 9a, 9b and 11a.
32°F nights are too rare in Miami (fewer than 1 year in 10) for NOAA to compute frost dates.
Each city's dates come from the nearest NOAA station that passes our quality rules. The methodology explains how we pick it.
| City | Last frost (50%) | First frost (50%) | Season (days, 50%) | Zone 2023 | Confidence | Planting calendar |
|---|---|---|---|---|---|---|
| Jacksonville frost dates | Feb 1* | Jan 5* | 330 | 9a–9b | High | Jacksonville planting calendar |
| Miami Freezes too rare for a typical frost date (NOAA) |
rare (0.2% of years) | rare | 365 | 11a | High | not built (frost too rare) |
* Not every winter reaches 32°F here; the date describes the years that do (NOAA conditional probability).
Station match, data and rules: methodology. Long-term odds, not a forecast.