Frost dates / Texas / Friendswood

Frost dates in Friendswood, TX

The station on this page is HOUSTON CLOVER FLD, TX US (USW00012975), 2.6 miles from the city point. Population in the Census 2024 estimate is 41,291.

Zone 9bUSDA average annual extreme minimum 25°F to 30°F, from ZIP 77546 (0.5 miles from the city point used on this page).

Median last 32°F is January 31. Median first 32°F is December 27. The 50% growing-season length is 328 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 1	Earlier date. A last 32°F on or after this day is common.
50%	January 31	Median.
10%	March 5	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 28	Earlier date. A first 32°F on or before this day is uncommon.
50%	December 27	Median.
90%	January 28	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%	365
50%	328
90%	286

28°F threshold

	10%	50%	90%
Last, on or after	February 20	January 18	December 22
First, on or before	December 14	January 8	February 4
Season at least	365 days	365 days	325 days

36°F threshold

	10%	50%	90%
Last, on or after	March 18	February 21	January 23
First, on or before	November 13	December 3	January 2
Season at least	324 days	287 days	252 days

Station HOUSTON CLOVER FLD, TX US (USW00012975). Completeness flag R, 17 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 88.7%. Freeze dates are conditional on that threshold occurring. Elevation 13.4 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 Friendswood · Zone 9b

Check a crop against this station

Friendswood, TX

Zone 9bAverage annual extreme minimum 25°F to 30°F

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

Texas. Nearest qualified station: HOUSTON CLOVER FLD, TX US (USW00012975), 2.6 miles. Median last 32°F January 31. Median first 32°F December 27. The 50% growing-season length is 328 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 5	January 31	January 1
First 32°F on or before	November 28	December 27	January 28

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 Texas A&M AgriLife Extension, Texas Home Vegetable Gardening Guide, retrieved 2026-10-10. Table 8 is statewide and is written as weeks before or after the frost-free date (spring) and the first freeze date (fall). It is not a single calendar date for every Texas city.

Crop

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