Frost dates for Llano, TX
At Llano, the median last spring frost (32°F) is Mar 20 and the median first fall frost is Nov 10, for a typical growing season of 235 days. For a 90% chance that the last frost has passed, wait until Apr 11. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 20Last spring frost (median)50% chance of 32°F after this date
- Apr 11Safer planting date10% chance of 32°F after this date
- Nov 10First fall frost (median)50% chance of 32°F by this date
- 235 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 15 | Apr 4 | Apr 22 |
| 32°F | Feb 28 | Mar 20 | Apr 11 |
| 28°F | Feb 9 | Mar 5 | Mar 26 |
| 24°F | Jan 18 | Feb 19 | Mar 13 |
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 21 | Nov 3 | Nov 18 |
| 32°F | Oct 28 | Nov 10 | Nov 30 |
| 28°F | Nov 4 | Nov 21 | Dec 10 |
| 24°F | Nov 14 | Dec 2 | Jan 1 |
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 | 190 days | 213 days | 240 days |
| 32°F | 207 days | 235 days | 264 days |
| 28°F | 233 days | 261 days | 292 days |
| 24°F | 257 days | 293 days | 332 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 99% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78643 | 8b | 15 to 20°F | 9 km |
| 78607 | 8b | 15 to 20°F | 18 km |
| 78609 | 8b | 15 to 20°F | 19 km |
| 78639 | 8b | 15 to 20°F | 21 km |
| 78672 | 8b | 15 to 20°F | 22 km |
| 76885 | 8b | 15 to 20°F | 24 km |
| 76832 | 8b | 15 to 20°F | 26 km |
| 76824 | 8b | 15 to 20°F | 28 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 USC00415272, at 30.7425, -98.6542, elevation 311 m (1,020 ft).
- Data quality: Standard (24+ years of data), 24 years of freeze data.
- Average days per year at or below 32°F: 50.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Burnet Muni Airport (40 km)
- Burnet (40 km)
- Johnson City 2n (55 km)
- Mason (55 km)
- Austin 33 NW (56 km)
- Lampasas (58 km)
- Fredericksburg (61 km)
- San Saba 7nw (61 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.