Frost dates / Georgia / Smyrna

Frost dates in Smyrna, GA

The station on this page is MABLETON 1 N, GA US (USC00095404), 3.6 miles from the city point. Population in the Census 2024 estimate is 57,177.

Zone 8aUSDA average annual extreme minimum 10°F to 15°F, from ZIP 30082 (1.3 miles from the city point used on this page).

Median last 32°F is March 27. Median first 32°F is November 7. The 50% growing-season length is 225 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%	March 9	Earlier date. A last 32°F on or after this day is common.
50%	March 27	Median.
10%	April 12	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%	October 27	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 7	Median.
90%	November 26	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%	249
50%	225
90%	205

28°F threshold

	10%	50%	90%
Last, on or after	March 31	March 14	February 21
First, on or before	November 4	November 19	December 9
Season at least	281 days	250 days	225 days

36°F threshold

	10%	50%	90%
Last, on or after	April 24	April 8	March 23
First, on or before	October 19	October 30	November 10
Season at least	225 days	204 days	184 days

Station MABLETON 1 N, GA US (USC00095404). Completeness flag R, 13 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 298.7 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 Smyrna · Zone 8a

Check a crop against this station

Smyrna, GA

Zone 8aAverage annual extreme minimum 10°F to 15°F

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

Georgia. Nearest qualified station: MABLETON 1 N, GA US (USC00095404), 3.6 miles. Median last 32°F March 27. Median first 32°F November 7. The 50% growing-season length is 225 days.

Open the ZIP page · Crop guides for Georgia

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 12	March 27	March 9
First 32°F on or before	October 27	November 7	November 26

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 UGA Cooperative Extension, Vegetable Gardening in Georgia, Circular 963, retrieved 2026-10-10. Circular 963, revised June 2023, prints one vegetable planting chart for the state. It does not give separate dates for North, Middle, and South Georgia. Where several cultivar rows share a crop name, the page uses the dates those rows print in common and names the row when a date differs.

Crop

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