Frost dates / Tennessee / Collierville

Frost dates in Collierville, TN

The station on this page is COLLIERVILLE, TN US (USC00401950), 2.7 miles from the city point. Population in the Census 2024 estimate is 51,951.

Zone 8aUSDA average annual extreme minimum 10°F to 15°F, from ZIP 38017 (2.7 miles from the city point used on this page).

Median last 32°F is March 29. Median first 32°F is November 3. The 50% growing-season length is 220 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 29	Median.
10%	April 15	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 22	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 3	Median.
90%	November 20	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%	246
50%	220
90%	197

28°F threshold

	10%	50%	90%
Last, on or after	April 3	March 13	February 24
First, on or before	October 31	November 14	December 4
Season at least	273 days	246 days	219 days

36°F threshold

	10%	50%	90%
Last, on or after	April 26	April 9	March 24
First, on or before	October 12	October 25	November 6
Season at least	219 days	198 days	176 days

Station COLLIERVILLE, TN US (USC00401950). Completeness flag R, 14 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 91.4 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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Collierville, TN

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

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

Tennessee. Nearest qualified station: COLLIERVILLE, TN US (USC00401950), 2.7 miles. Median last 32°F March 29. Median first 32°F November 3. The 50% growing-season length is 220 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 15	March 29	March 9
First 32°F on or before	October 22	November 3	November 20

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.

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Planting calendar

Frost dates for Tennessee are above. Planting windows appear for states with a cited extension guide. The fall and seed tools use the numbers you enter and the station dates.

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