Frost dates / Florida / Largo

Frost dates in Largo, FL

The station on this page is ST PETERSBURG INTL AP, FL US (USW00012873), 5.3 miles from the city point. Population in the Census 2024 estimate is 82,337.

Zone 10aUSDA average annual extreme minimum 30°F to 35°F, from ZIP 33771 (1 miles from the city point used on this page).

Median last 32°F is January 17. Median first 32°F is January 14. The 50% growing-season length is 365 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.

Probability	Date	How to read it
90%	January 1	Earlier date. A last 32°F on or after this day is common.
50%	January 17	Median.
10%	February 6	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 27	Earlier date. A first 32°F on or before this day is uncommon.
50%	January 14	Median.
90%	February 4	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%	365
90%	345

36°F threshold

	10%	50%	90%
Last, on or after	February 17	January 23	January 1
First, on or before	December 22	January 12	February 6
Season at least	365 days	353 days	318 days

Station ST PETERSBURG INTL AP, FL US (USW00012873). Completeness flag R, 17 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 23.3%. Freeze dates are conditional on that threshold occurring. Elevation 3.4 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 Largo · Zone 10a

Check a crop against this station

Largo, FL

Zone 10aAverage annual extreme minimum 30°F to 35°F

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Florida. Nearest qualified station: ST PETERSBURG INTL AP, FL US (USW00012873), 5.3 miles. Median last 32°F January 17. Median first 32°F January 14. The 50% growing-season length is 365 days.

Open the ZIP page · Crop guides for Florida

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	February 6	January 17	January 1
First 32°F on or before	December 27	January 14	February 4

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.

A wall calendar surrounded by vegetables, herbs, seed packets, and watering cans.

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.

Crop

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