Frost dates for White River Reservoir, TX
At White River Reservoir, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 8, for a typical growing season of 222 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 8First fall frost (median)50% chance of 32°F by this date
- 222 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 24 | Apr 11 | Apr 27 |
| 32°F | Mar 7 | Mar 31 | Apr 18 |
| 28°F | Feb 26 | Mar 13 | Apr 4 |
| 24°F | Feb 11 | Mar 2 | Mar 21 |
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 16 | Oct 31 | Nov 12 |
| 32°F | Oct 26 | Nov 8 | Nov 22 |
| 28°F | Nov 2 | Nov 16 | Dec 2 |
| 24°F | Nov 10 | Nov 28 | Dec 17 |
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 | 180 days | 202 days | 223 days |
| 32°F | 200 days | 222 days | 248 days |
| 28°F | 221 days | 247 days | 271 days |
| 24°F | 244 days | 271 days | 298 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 79370 | 8a | 10 to 15°F | 15 km |
| 79322 | 7b | 5 to 10°F | 25 km |
| 79356 | 8a | 10 to 15°F | 30 km |
| 79243 | 7b | 5 to 10°F | 35 km |
| 79357 | 7b | 5 to 10°F | 36 km |
| 79518 | 8a | 10 to 15°F | 36 km |
| 79229 | 8a | 10 to 15°F | 40 km |
| 79220 | 7b | 5 to 10°F | 46 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 USC00419711, at 33.4561, -101.0925, elevation 735 m (2,412 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 78.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
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.