Frost dates for Burnet Muni Airport, TX
At Burnet Muni Airport, the median last spring frost (32°F) is Mar 6 and the median first fall frost is Nov 23, for a typical growing season of 262 days. For a 90% chance that the last frost has passed, wait until Mar 28. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 6Last spring frost (median)50% chance of 32°F after this date
- Mar 28Safer planting date10% chance of 32°F after this date
- Nov 23First fall frost (median)50% chance of 32°F by this date
- 262 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 28 | Mar 19 | Apr 10 |
| 32°F | Feb 13 | Mar 6 | Mar 28 |
| 28°F | Jan 21 | Feb 21 | Mar 13 |
| 24°F | Dec 27 | Feb 1 | Mar 3 |
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 30 | Nov 12 | Dec 1 |
| 32°F | Nov 5 | Nov 23 | Dec 12 |
| 28°F | Nov 15 | Dec 6 | Jan 3 |
| 24°F | Nov 27 | Dec 27 | Feb 3 |
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 | 211 days | 239 days | 266 days |
| 32°F | 235 days | 262 days | 290 days |
| 28°F | 261 days | 291 days | 328 days |
| 24°F | 290 days | 329 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 88% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78611 | 8b | 15 to 20°F | 8 km |
| 78605 | 8b | 15 to 20°F | 19 km |
| 78654 | 8b | 15 to 20°F | 19 km |
| 78609 | 8b | 15 to 20°F | 21 km |
| 78639 | 8b | 15 to 20°F | 23 km |
| 78607 | 8b | 15 to 20°F | 26 km |
| 78657 | 8b | 15 to 20°F | 27 km |
| 78642 | 8b | 15 to 20°F | 29 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 USW00003999, at 30.7406, -98.2353, elevation 393 m (1,288 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 26.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Burnet (2 km)
- Austin 33 NW (20 km)
- Lampasas (37 km)
- Llano (40 km)
- Georgetown Lake (50 km)
- Johnson City 2n (52 km)
- Austin Great Hills (58 km)
- Dripping Springs 6 E (63 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.