Frost dates for New Braunfels, TX
At New Braunfels, the median last spring frost (32°F) is Mar 8 and the median first fall frost is Nov 18, for a typical growing season of 253 days. For a 90% chance that the last frost has passed, wait until Apr 1. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 8Last spring frost (median)50% chance of 32°F after this date
- Apr 1Safer planting date10% chance of 32°F after this date
- Nov 18First fall frost (median)50% chance of 32°F by this date
- 253 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 25 | Apr 18 |
| 32°F | Feb 17 | Mar 8 | Apr 1 |
| 28°F | Jan 29 | Feb 24 | Mar 17 |
| 24°F | Jan 3 | Feb 7 | Mar 8 |
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 7 | Nov 25 |
| 32°F | Nov 2 | Nov 18 | Dec 10 |
| 28°F | Nov 10 | Dec 2 | Jan 8 |
| 24°F | Nov 27 | Dec 28 | Feb 2 |
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 | 200 days | 227 days | 256 days |
| 32°F | 223 days | 253 days | 287 days |
| 28°F | 251 days | 284 days | 319 days |
| 24°F | 281 days | 318 days | 364 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 91% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78132 | 9a | 20 to 25°F | 11 km |
| 78124 | 9a | 20 to 25°F | 12 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 USC00416276, at 29.6597, -98.1636, elevation 220 m (720 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 32.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- New Braunfels WFO (14 km)
- Austin San Antonio (14 km)
- Randolph AFB (17 km)
- Canyon Dam (23 km)
- San Marcos (32 km)
- San Antonio Intl Airport (34 km)
- San Antonio Incarnate Word (37 km)
- San Antonio Stinson Airport (47 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.