Frost dates / Louisiana / Alexandria

Frost dates in Alexandria, LA

The station on this page is ALEXANDRIA, LA US (USC00160098), 2 miles from the city point. Population in the Census 2024 estimate is 43,133.

Zone 9aUSDA average annual extreme minimum 20°F to 25°F, from ZIP 71301 (1.3 miles from the city point used on this page).

Median last 32°F is February 27. Median first 32°F is November 27. The 50% growing-season length is 274 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 31	Earlier date. A last 32°F on or after this day is common.
50%	February 27	Median.
10%	March 18	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%	November 7	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 27	Median.
90%	December 19	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%	306
50%	274
90%	243

28°F threshold

	10%	50%	90%
Last, on or after	March 8	February 8	January 6
First, on or before	November 18	December 13	January 10
Season at least	348 days	308 days	273 days

36°F threshold

	10%	50%	90%
Last, on or after	April 2	March 12	February 21
First, on or before	October 31	November 14	December 1
Season at least	274 days	248 days	220 days

Station ALEXANDRIA, LA US (USC00160098). Completeness flag S, 28 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 26.5 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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Alexandria, LA

Zone 9aAverage annual extreme minimum 20°F to 25°F

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

Louisiana. Nearest qualified station: ALEXANDRIA, LA US (USC00160098), 2 miles. Median last 32°F February 27. Median first 32°F November 27. The 50% growing-season length is 274 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 18	February 27	January 31
First 32°F on or before	November 7	November 27	December 19

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 Louisiana 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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