Frost dates for Johnson City 2n, TX
At Johnson City 2n, the median last spring frost (32°F) is Mar 22 and the median first fall frost is Nov 9, 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 22Last spring frost (median)50% chance of 32°F after this date
- Apr 11Safer planting date10% chance of 32°F after this date
- Nov 9First 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 14 | Apr 4 | Apr 24 |
| 32°F | Feb 27 | Mar 22 | Apr 11 |
| 28°F | Feb 11 | Mar 6 | Mar 28 |
| 24°F | Jan 19 | Feb 22 | Mar 15 |
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 17 | Nov 1 | Nov 16 |
| 32°F | Oct 25 | Nov 9 | Nov 30 |
| 28°F | Nov 2 | Nov 22 | Dec 15 |
| 24°F | Nov 11 | Dec 6 | Jan 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 | 186 days | 210 days | 235 days |
| 32°F | 207 days | 235 days | 261 days |
| 28°F | 231 days | 260 days | 290 days |
| 24°F | 258 days | 293 days | 333 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 |
|---|---|---|---|
| 78636 | 8b | 15 to 20°F | 2 km |
| 78663 | 8b | 15 to 20°F | 16 km |
| 78635 | 8b | 15 to 20°F | 17 km |
| 78671 | 8b | 15 to 20°F | 23 km |
| 78657 | 8b | 15 to 20°F | 26 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 USC00414605, at 30.3000, -98.4094, elevation 347 m (1,137 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 42.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Blanco (23 km)
- Dripping Springs 6 E (41 km)
- Austin 33 NW (47 km)
- Fredericksburg (48 km)
- Burnet Muni Airport (52 km)
- Canyon Dam (53 km)
- Burnet (54 km)
- Llano (55 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.