Frost dates / Florida / Jacksonville
Frost dates in Jacksonville, FL
The station on this page is JACKSONVILLE NAS, FL US (USW00093837), 7.2 miles from the city point. Population in the Census 2024 estimate is 1,009,833.
Zone 9bUSDA average annual extreme minimum 25°F to 30°F, from ZIP 32203 (0.6 miles from the city point used on this page).
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Last 32°F in spring
NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.
| Probability | Date | How to read it |
|---|---|---|
| 90% | December 31 | Earlier date. A last 32°F on or after this day is common. |
| 50% | February 1 | Median. |
| 10% | March 3 | Later date. A last 32°F on or after this day is uncommon. |
First 32°F in fall
NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.
| Probability | Date | How to read it |
|---|---|---|
| 10% | December 3 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | January 5 | Median. |
| 90% | February 6 | Later date. A first 32°F on or before this day is common. |
32°F growing-season length
Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.
| Probability the season is at least this long | Days |
|---|---|
| 10% | 365 |
| 50% | 330 |
| 90% | 299 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | February 19 | January 22 | December 28 |
| First, on or before | December 19 | January 14 | February 12 |
| Season at least | 365 days | 365 days | 325 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 15 | February 18 | January 20 |
| First, on or before | November 20 | December 17 | January 22 |
| Season at least | 334 days | 302 days | 265 days |
Station JACKSONVILLE NAS, FL US (USW00093837). Completeness flag R, 23 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 80.2%. Freeze dates are conditional on that threshold occurring. Elevation 6.1 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.
Planting calendar for Jacksonville · Zone 9b
Check a crop against this station
Jacksonville, FL
Zone 9bAverage annual extreme minimum 25°F to 30°F
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Florida. Nearest qualified station: JACKSONVILLE NAS, FL US (USW00093837), 7.2 miles. Median last 32°F February 1. Median first 32°F January 5. The 50% growing-season length is 330 days.
Open the ZIP page · Crop guides for Florida
32°F probabilities at this station
| 10% | 50% | 90% | |
|---|---|---|---|
| Last 32°F on or after | March 3 | February 1 | December 31 |
| First 32°F on or before | December 3 | January 5 | February 6 |
Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.
Planting calendar
Windows below are from UF/IFAS, Florida Vegetable Gardening Guide (SP 103/VH021), retrieved 2026-10-10. North = all of Florida north of State Road 40; central = the section of Florida between State Roads 40 and 70; south = all of Florida below State Road 70.
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