Frost dates for Austin 6s, TX
At Austin 6s, the median last spring frost (32°F) is Mar 10 and the median first fall frost is Nov 17, for a typical growing season of 252 days. For a 90% chance that the last frost has passed, wait until Mar 31. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 10Last spring frost (median)50% chance of 32°F after this date
- Mar 31Safer planting date10% chance of 32°F after this date
- Nov 17First fall frost (median)50% chance of 32°F by this date
- 252 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Mar 8 | Mar 25 | Apr 14 |
| 32°F | Feb 20 | Mar 10 | Mar 31 |
| 28°F | Jan 29 | Feb 28 | Mar 17 |
| 24°F | Jan 6 | Feb 6 | Mar 7 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 25 | Nov 6 | Nov 21 |
| 32°F | Nov 1 | Nov 17 | Dec 6 |
| 28°F | Nov 12 | Dec 1 | Dec 30 |
| 24°F | Nov 25 | Dec 24 | Jan 21 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 201 days | 226 days | 251 days |
| 32°F | 227 days | 252 days | 277 days |
| 28°F | 249 days | 279 days | 312 days |
| 24°F | 275 days | 313 days | 353 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 94% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78741 | 9a | 20 to 25°F | 2 km |
| 78704 | 9a | 20 to 25°F | 4 km |
| 78702 | 9a | 20 to 25°F | 5 km |
| 78701 | 9a | 20 to 25°F | 5 km |
| 78745 | 9a | 20 to 25°F | 7 km |
| 78721 | 9a | 20 to 25°F | 7 km |
| 78748 | 9a | 20 to 25°F | 11 km |
| 78749 | 9a | 20 to 25°F | 12 km |
| 78724 | 9a | 20 to 25°F | 13 km |
| 78610 | 9a | 20 to 25°F | 19 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00410431, at 30.2247, -97.7328, elevation 174 m (570 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 29.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Austin Bergstrom Airport (7 km)
- Austin-Camp Mabry (11 km)
- Austin Great Hills (21 km)
- Dripping Springs 6 E (25 km)
- Cedar Creek 5 S (34 km)
- Elgin 1 N (38 km)
- San Marcos (43 km)
- Georgetown Lake (50 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.