Frost dates / Texas / Austin
Frost dates in Austin, TX
The station on this page is AUSTIN-CAMP MABRY, TX US (USW00013958), 1.6 miles from the city point. Population in the Census 2024 estimate is 993,588.
Zone 9aUSDA average annual extreme minimum 20°F to 25°F, from ZIP 78703 (0.8 miles from the city point used on this page).
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% | January 23 | Earlier date. A last 32°F on or after this day is common. |
| 50% | February 20 | Median. |
| 10% | March 14 | 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 15 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | December 3 | Median. |
| 90% | January 1 | 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% | 326 |
| 50% | 291 |
| 90% | 258 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 3 | February 1 | December 29 |
| First, on or before | November 27 | December 27 | February 1 |
| Season at least | 365 days | 329 days | 288 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 27 | March 6 | February 14 |
| First, on or before | November 5 | November 22 | December 10 |
| Season at least | 288 days | 261 days | 235 days |
Station AUSTIN-CAMP MABRY, TX US (USW00013958). Completeness flag S, 30 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 99.4%. Freeze dates are conditional on that threshold occurring. Elevation 204.2 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 Austin · Zone 9a
Check a crop against this station
Austin, 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-CAMP MABRY, TX US (USW00013958), 1.6 miles. Median last 32°F February 20. Median first 32°F December 3. The 50% growing-season length is 291 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 14 | February 20 | January 23 |
| First 32°F on or before | November 15 | December 3 | January 1 |
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.
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.
Date checks use your device’s calendar and appear after the page loads.