Frost dates / Texas / Weslaco

Frost dates in Weslaco, TX

The station on this page is WESLACO, TX US (USC00419588), 1.6 miles from the city point. Population in the Census 2024 estimate is 43,864.

Zone 10aUSDA average annual extreme minimum 30°F to 35°F, from ZIP 78599 (3.9 miles from the city point used on this page).

Median last 32°F is January 8. Median first 32°F is December 31. The 50% growing-season length is 365 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%	December 8	Earlier date. A last 32°F on or after this day is common.
50%	January 8	Median.
10%	February 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%	December 3	Earlier date. A first 32°F on or before this day is uncommon.
50%	December 31	Median.
90%	February 7	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%	365
90%	332

36°F threshold

	10%	50%	90%
Last, on or after	March 1	January 28	December 18
First, on or before	November 25	December 19	January 27
Season at least	365 days	331 days	292 days

Station WESLACO, TX US (USC00419588). Completeness flag R, 18 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 43.9%. Freeze dates are conditional on that threshold occurring. Elevation 22.9 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 Weslaco · Zone 10a

Check a crop against this station

Weslaco, TX

Zone 10aAverage annual extreme minimum 30°F to 35°F

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

Texas. Nearest qualified station: WESLACO, TX US (USC00419588), 1.6 miles. Median last 32°F January 8. Median first 32°F December 31. The 50% growing-season length is 365 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	February 18	January 8	December 8
First 32°F on or before	December 3	December 31	February 7

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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