When is the last frost in Austin, Texas?

Austin's average last spring frost falls in late February, based on NOAA climate normals. This is the median date by which the risk of a 32°F freeze has typically passed, though about half of years see a later frost. For frost-sensitive plants, many Austin gardeners wait a week or two past the average date to be safe.

When is the first frost in Austin, Texas?

Austin's average first fall frost falls in early December, based on NOAA climate normals. As with the spring date, it is a median: roughly half of years see an earlier first frost and half see a later one, and the cooler Hill Country to the west can frost a week or more earlier than the warm urban core.

How long is the growing season in Austin?

Austin's average frost-free growing season runs roughly about 280 days, from the late February last frost to the early-December first frost. That is one of the longest growing seasons in the country, which is why warm-season grasses thrive and Austin sees more mowing months than cooler climates.

What USDA hardiness zone is Austin, Texas?

Austin sits in USDA Plant Hardiness Zone 8b to 9a. Much of the metro is Zone 8b (average annual minimum 15°F to 20°F), while warmer urban pockets and the heat-island core reach Zone 9a (20°F to 25°F). Use the zone rating to choose plants rated to survive Austin's typical winter lows.

Do frost dates vary across the Austin area?

Yes. Central and east Austin run warmest from the urban heat-island effect and push toward Zone 9a with the latest first frosts, while the cooler Hill Country to the west can see frost a week or more earlier in fall and later in spring. Low-lying rural spots also cool faster on clear nights. Treat your own yard's microclimate as the final word.

When should I plant grass based on Austin's frost dates?

Use Austin's average last frost in late February to time spring planting of warm-season grasses like St. Augustine, Bermuda, and Zoysia, planting after the last frost through early summer once soil has warmed. The long growing season gives a wide window, with mid-summer heat, not frost, being the main limit. Use the early-December first frost to wrap up the lawn before dormancy.

Austin Frost Dates and Growing Season: First and Last Frost and Planting Calendar

Quick answer: In Austin, Texas, the average last spring frost falls in late February and the average first fall frost falls in early December, giving Austin a long growing season of roughly about 280 days. Austin sits in USDA Plant Hardiness Zone 8b to 9a (much of the metro is 8b, with warmer urban pockets reaching 9a). Because frost timing varies year to year and across the metro, these are long-term averages based on NOAA climate normals, your specific yard, especially in the cooler Hill Country to the west, can run a week or two different. Use them to time planting, protect tender plants, and plan the warm-season lawn calendar.

Austin frost dates and growing season at a glance

<table> <thead> <tr> <th>Metric</th> <th>Austin, TX (long-term average)</th> </tr> </thead> <tbody> <tr> <td>Average last spring frost (32°F)</td> <td>Late February</td> </tr> <tr> <td>Average first fall frost (32°F)</td> <td>Early December</td> </tr> <tr> <td>Average frost-free growing season</td> <td>~280 days</td> </tr> <tr> <td>USDA Plant Hardiness Zone</td> <td>8b–9a (much of metro 8b; warm urban pockets 9a)</td> </tr> <tr> <td>Zone 8b average annual minimum temp</td> <td>15°F to 20°F</td> </tr> <tr> <td>Zone 9a average annual minimum temp</td> <td>20°F to 25°F</td> </tr> <tr> <td>Source basis</td> <td>NOAA U.S. Climate Normals; USDA Plant Hardiness Zone Map</td> </tr> </tbody> </table>

What “average frost date” actually means

A frost date is a probability, not a guarantee. The “average last frost” is the date by which, in a typical year, the risk of a 32°F freeze has passed, but roughly half of years see a later frost and half see an earlier one. NOAA publishes these as climate normals at several probability levels (for example, a 10%, 50%, and 90% chance of frost after a given date). The dates above are the 50% (median) values for the Austin area. For frost-sensitive plants, gardeners often wait until the 90% safe-planting date in mid-March, about two weeks past the average, to be safe.

Why Austin’s frost dates vary across the metro

Austin’s frost timing is not uniform across the region:

Central and east Austin, including the urban core, run warmest thanks to the urban heat-island effect and lower elevation, these areas push toward Zone 9a and the latest first frosts.
The Hill Country to the west (parts of western Travis and into the higher terrain) sits cooler and can see frost a week or more earlier in fall and later in spring.
Low-lying and rural spots outside the urban core cool faster on clear, calm nights and can get localized frost when the city does not.

Always treat your own yard’s microclimate, slope, tree cover, and proximity to pavement, as the final word.

What the long growing season means for your Austin lawn and garden

Austin’s 280-day growing season is one of the longest in the country, and it shapes the whole lawn and landscape calendar:

Warm-season grasses thrive. St. Augustine, Bermuda, and Zoysia have a long window to grow, which is why the best time to plant or sod them is after the last frost in spring through early summer.
More mowing months. The long season means more mows per year than cooler climates, a real factor in annual lawn-care planning.
A wide planting window. The extended frost-free stretch gives generous spring and fall windows for planting, with the brutal mid-summer heat, not frost, being the main limit.
Tender plants still need protection. Despite the long season, Austin does get hard freezes (the 2021 freeze is a stark reminder), so Zone-appropriate, cold-hardy plant choices matter.

How to use these dates

Use the average last frost (late February) to time spring planting of warm-season grass and frost-tender plants, waiting a week or two past it for the most cold-sensitive ones. Use the average first frost (early December) to schedule fall cleanup, protect tender plants, and wrap up the warm-season lawn before dormancy. And use the USDA Zone 8b-9a rating to choose plants rated to survive Austin’s winter lows. For a plan built around your exact lot and microclimate, a local pro can dial in the timing.

Talk to an Austin Landscaping Pro

Want a planting and lawn-care calendar built around Austin’s frost dates, growing season, and your specific yard? Austin Pro Landscape offers free written estimates. Call (512) 690-4912.

Austin Frost Dates & Growing Season: Average First Frost, Last Frost, and Season Length