Frost dates / Texas / Frisco

Frost dates in Frisco, TX

The station on this page is RICHARDSON, TX US (USC00417588), 11.9 miles from the city point. Population in the Census 2024 estimate is 235,208.

Zone 8bUSDA average annual extreme minimum 15°F to 20°F, from ZIP 75033 (2.4 miles from the city point used on this page).

Median last 32°F is March 7. Median first 32°F is November 21. The 50% growing-season length is 259 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 18	Earlier date. A last 32°F on or after this day is common.
50%	March 7	Median.
10%	March 29	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 2	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 21	Median.
90%	December 9	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%	285
50%	259
90%	232

28°F threshold

	10%	50%	90%
Last, on or after	March 12	February 24	January 27
First, on or before	November 14	December 4	December 26
Season at least	318 days	288 days	256 days

36°F threshold

	10%	50%	90%
Last, on or after	April 11	March 21	March 2
First, on or before	October 23	November 10	November 27
Season at least	258 days	233 days	205 days

Station RICHARDSON, TX US (USC00417588). 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 206.7 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 Frisco · Zone 8b

Check a crop against this station

Frisco, 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: RICHARDSON, TX US (USC00417588), 11.9 miles. Median last 32°F March 7. Median first 32°F November 21. The 50% growing-season length is 259 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 29	March 7	February 18
First 32°F on or before	November 2	November 21	December 9

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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