ZIP 32768 Zone 9b

Florida · USDA zone 9b, average annual extreme minimum 25°F to 30°F.

Nearest qualified station: MT PLYMOUTH 1SSW, FL US (USC00087228), 7.3 miles from the Census ZCTA internal point for this ZIP.

Median last 32°F is February 24. Median first 32°F is December 29. The 50% growing-season length is 301 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

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.

ProbabilityDateHow to read it
90%January 22Earlier date. A last 32°F on or after this day is common.
50%February 24Median.
10%March 20Later 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.

ProbabilityDateHow to read it
10%November 29Earlier date. A first 32°F on or before this day is uncommon.
50%December 29Median.
90%January 27Later 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 longDays
10%335
50%301
90%266

28°F threshold

10%50%90%
Last, on or afterMarch 6February 3January 5
First, on or beforeDecember 12January 10February 9
Season at least365 days332 days295 days

36°F threshold

10%50%90%
Last, on or afterMarch 31March 12February 12
First, on or beforeNovember 11December 7January 6
Season at least306 days273 days238 days

Station MT PLYMOUTH 1SSW, FL US (USC00087228). Completeness flag R, 11 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 97.9%. Freeze dates are conditional on that threshold occurring. Elevation 27.4 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

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