Frost dates for Austin 33 NW, TX
At Austin 33 NW, the median last spring frost (32°F) is Mar 2 and the median first fall frost is Nov 29, for a typical growing season of 274 days. For a 90% chance that the last frost has passed, wait until Mar 20. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 2Last spring frost (median)50% chance of 32°F after this date
- Mar 20Safer planting date10% chance of 32°F after this date
- Nov 29First fall frost (median)50% chance of 32°F by this date
- 274 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 | Feb 25 | Mar 14 | Apr 5 |
| 32°F | Feb 6 | Mar 2 | Mar 20 |
| 28°F | Jan 12 | Feb 16 | Mar 11 |
| 24°F | Dec 20 | Jan 29 | Mar 2 |
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 | Nov 2 | Nov 18 | Dec 5 |
| 32°F | Nov 10 | Nov 29 | Dec 19 |
| 28°F | Nov 20 | Dec 13 | Jan 16 |
| 24°F | Dec 4 | Dec 30 | Feb 10 |
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 | 223 days | 249 days | 273 days |
| 32°F | 245 days | 274 days | 304 days |
| 28°F | 271 days | 304 days | 342 days |
| 24°F | 300 days | 339 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 98% |
| 24°F | 77% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78654 | 8b | 15 to 20°F | 13 km |
| 78642 | 8b | 15 to 20°F | 16 km |
| 78605 | 8b | 15 to 20°F | 17 km |
| 78641 | 9a | 20 to 25°F | 18 km |
| 78669 | 8b | 15 to 20°F | 20 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 USW00023907, at 30.6222, -98.0847, elevation 415 m (1,361 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 20.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Burnet Muni Airport (20 km)
- Burnet (21 km)
- Georgetown Lake (35 km)
- Austin Great Hills (38 km)
- Austin-Camp Mabry (46 km)
- Dripping Springs 6 E (46 km)
- Johnson City 2n (47 km)
- Lampasas (51 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.