When is the last spring frost in Cedar Park, TX?

The median last 32°F date at the station on this page is March 11. NOAA’s 1991–2020 normals give a 50% chance the last spring minimum of 32°F or lower occurs on or after that date. The 90% date is February 22. The 10% date, the later one, is March 29. These are normals, not a forecast for this spring.

What USDA zone is Cedar Park, TX?

The zone on this page is 9a, from ZIP 78613 in the 2023 PRISM table of the USDA Plant Hardiness Zone Map. That ZIP is 0.2 miles from the city point. USDA defines the zone as the average annual extreme minimum, shown here as 20°F to 25°F. It is a winter-cold band, not a frost date and not a forecast.

How far away is the weather station?

The station named on this page is 7.3 miles from the city point in a straight line. Frost dates are 1991–2020 NOAA climate normals for that instrument. They are not a National Weather Service forecast for one night, and they are not the temperature in every yard. The page names the station so the miles stay attached to the dates.

Frost dates in Cedar Park, TX

Direct answer. In Cedar Park, TX, the nearest qualified NOAA station is AUSTIN GREAT HILLS, TX US (USC00410433), 7.3 miles from the city point. The median last 32°F date is March 11, and the median first 32°F date is November 20, from the 1991–2020 U.S. Climate Normals. The 2023 USDA zone is 9a (20°F to 25°F), from ZIP 78613 in the PRISM table, 0.2 miles from the same city point.

Population in the Census 2024 estimate is 78,380. The station is AUSTIN GREAT HILLS, TX US (USC00410433).

Zone 9aUSDA average annual extreme minimum 20°F to 25°F, from ZIP 78613 (0.2 miles from the city point used on this page).

Median last 32°F is March 11. Median first 32°F is November 20. The 50% growing-season length is 254 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 22	Earlier date. A last 32°F on or after this day is common.
50%	March 11	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 3	Earlier date. A first 32°F on or before this day is uncommon.
50%	November 20	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%	278
50%	254
90%	230

28°F threshold

	10%	50%	90%
Last, on or after	March 19	March 1	January 31
First, on or before	November 12	December 3	December 29
Season at least	309 days	278 days	252 days

36°F threshold

	10%	50%	90%
Last, on or after	April 11	March 25	March 6
First, on or before	October 27	November 10	November 27
Season at least	256 days	231 days	207 days

Station AUSTIN GREAT HILLS, TX US (USC00410433). Completeness flag R, 13 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 268.2 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Questions

When is the last spring frost in Cedar Park, TX?: The median last 32°F date at the station on this page is March 11. NOAA’s 1991–2020 normals give a 50% chance the last spring minimum of 32°F or lower occurs on or after that date. The 90% date is February 22. The 10% date, the later one, is March 29. These are normals, not a forecast for this spring.
What USDA zone is Cedar Park, TX?: The zone on this page is 9a, from ZIP 78613 in the 2023 PRISM table of the USDA Plant Hardiness Zone Map. That ZIP is 0.2 miles from the city point. USDA defines the zone as the average annual extreme minimum, shown here as 20°F to 25°F. It is a winter-cold band, not a frost date and not a forecast.
How far away is the weather station?: The station named on this page is 7.3 miles from the city point in a straight line. Frost dates are 1991–2020 NOAA climate normals for that instrument. They are not a National Weather Service forecast for one night, and they are not the temperature in every yard. The page names the station so the miles stay attached to the dates.

Planting calendar for Cedar Park · Zone 9a

Check a crop against this station

Cedar Park, TX

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

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

Texas. Nearest qualified station: AUSTIN GREAT HILLS, TX US (USC00410433), 7.3 miles. Median last 32°F March 11. Median first 32°F November 20. The 50% growing-season length is 254 days.

Open the ZIP page · Crop guides for Texas

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	March 29	March 11	February 22
First 32°F on or before	November 3	November 20	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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