Frost dates for Canyon Dam, TX
At Canyon Dam, the median last spring frost (32°F) is Mar 1 and the median first fall frost is Dec 1, for a typical growing season of 276 days. For a 90% chance that the last frost has passed, wait until Mar 22. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 1Last spring frost (median)50% chance of 32°F after this date
- Mar 22Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 276 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 21 | Mar 12 | Apr 4 |
| 32°F | Jan 31 | Mar 1 | Mar 22 |
| 28°F | Jan 4 | Feb 10 | Mar 9 |
| 24°F | Dec 25 | Jan 25 | Feb 28 |
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 1 | Nov 16 | Dec 5 |
| 32°F | Nov 9 | Dec 1 | Dec 26 |
| 28°F | Nov 23 | Dec 19 | Jan 21 |
| 24°F | Dec 11 | Jan 5 | Feb 16 |
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 | 220 days | 249 days | 275 days |
| 32°F | 244 days | 276 days | 313 days |
| 28°F | 274 days | 311 days | 351 days |
| 24°F | 311 days | 354 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 96% |
| 24°F | 65% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78133 | 9a | 20 to 25°F | 6 km |
| 78623 | 9a | 20 to 25°F | 11 km |
| 78676 | 8b | 15 to 20°F | 20 km |
| 78070 | 8b | 15 to 20°F | 21 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 USC00411429, at 29.8608, -98.1958, elevation 305 m (1,000 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 18.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- New Braunfels (23 km)
- New Braunfels WFO (24 km)
- Austin San Antonio (24 km)
- San Marcos (24 km)
- Blanco (33 km)
- Randolph AFB (36 km)
- Dripping Springs 6 E (45 km)
- San Antonio Intl Airport (45 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.