Frost dates / Texas / McKinney

Frost dates in McKinney, TX

The station on this page is MCKINNEY MUNICIPAL AIRPORT, TX US (USC00415766), 4.3 miles from the city point. Population in the Census 2024 estimate is 227,526.

Zone 8bUSDA average annual extreme minimum 15°F to 20°F, from ZIP 75072 (2.3 miles from the city point used on this page).

Median last 32°F is March 17. Median first 32°F is November 15. The 50% growing-season length is 241 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%	February 27	Earlier date. A last 32°F on or after this day is common.
50%	March 17	Median.
10%	April 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%	October 27	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 15	Median.
90%	December 5	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%	268
50%	241
90%	213

28°F threshold

	10%	50%	90%
Last, on or after	March 24	March 4	February 15
First, on or before	November 6	November 30	December 23
Season at least	296 days	266 days	235 days

36°F threshold

	10%	50%	90%
Last, on or after	April 19	March 31	March 9
First, on or before	October 20	November 3	November 24
Season at least	243 days	217 days	194 days

Station MCKINNEY MUNICIPAL AIRPORT, TX US (USC00415766). Completeness flag R, 11 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 178.6 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 McKinney · Zone 8b

Check a crop against this station

McKinney, TX

Zone 8bAverage annual extreme minimum 15°F to 20°F

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

Texas. Nearest qualified station: MCKINNEY MUNICIPAL AIRPORT, TX US (USC00415766), 4.3 miles. Median last 32°F March 17. Median first 32°F November 15. The 50% growing-season length is 241 days.

Open the ZIP page · Crop guides for Texas

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	April 5	March 17	February 27
First 32°F on or before	October 27	November 15	December 5

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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