Frost dates / Mississippi / Biloxi

Frost dates in Biloxi, MS

The station on this page is BILOXI, MS US (USC00220792), 4.5 miles from the city point. Population in the Census 2024 estimate is 48,144.

Zone 9aUSDA average annual extreme minimum 20°F to 25°F, from ZIP 39534 (1.5 miles from the city point used on this page).

Median last 32°F is February 12. Median first 32°F is December 14. The 50% growing-season length is 301 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 18	Earlier date. A last 32°F on or after this day is common.
50%	February 12	Median.
10%	March 11	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 16	Earlier date. A first 32°F on or before this day is uncommon.
50%	December 14	Median.
90%	January 11	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%	336
50%	301
90%	265

28°F threshold

	10%	50%	90%
Last, on or after	February 28	January 27	January 2
First, on or before	December 2	January 2	January 27
Season at least	365 days	335 days	296 days

36°F threshold

	10%	50%	90%
Last, on or after	March 20	March 1	February 6
First, on or before	November 6	November 26	December 23
Season at least	302 days	270 days	242 days

Station BILOXI, MS US (USC00220792). Completeness flag S, 29 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 98.8%. Freeze dates are conditional on that threshold occurring. Elevation 3 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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Biloxi, MS

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

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

Mississippi. Nearest qualified station: BILOXI, MS US (USC00220792), 4.5 miles. Median last 32°F February 12. Median first 32°F December 14. The 50% growing-season length is 301 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 11	February 12	January 18
First 32°F on or before	November 16	December 14	January 11

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 Mississippi 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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