Frost dates / Louisiana / Lafayette

Frost dates in Lafayette, LA

The station on this page is LAFAYETTE, LA US (USC00165021), 2.4 miles from the city point. Population in the Census 2024 estimate is 122,280.

Zone 9aUSDA average annual extreme minimum 20°F to 25°F, from ZIP 70503 (2.9 miles from the city point used on this page).

Median last 32°F is February 26. Median first 32°F is November 28. The 50% growing-season length is 279 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 29	Earlier date. A last 32°F on or after this day is common.
50%	February 26	Median.
10%	March 20	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 28	Median.
90%	December 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%	312
50%	279
90%	247

28°F threshold

	10%	50%	90%
Last, on or after	March 8	February 5	January 2
First, on or before	November 18	December 14	January 18
Season at least	352 days	313 days	276 days

36°F threshold

	10%	50%	90%
Last, on or after	April 3	March 11	February 17
First, on or before	November 1	November 13	December 4
Season at least	279 days	250 days	221 days

Station LAFAYETTE, LA US (USC00165021). Completeness flag R, 21 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 99.6%. Freeze dates are conditional on that threshold occurring. Elevation 7.6 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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Lafayette, 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: LAFAYETTE, LA US (USC00165021), 2.4 miles. Median last 32°F February 26. Median first 32°F November 28. The 50% growing-season length is 279 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 20	February 26	January 29
First 32°F on or before	November 7	November 28	December 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.

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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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