Frost dates for Granger Dam, TX
At Granger Dam, the median last spring frost (32°F) is Mar 5 and the median first fall frost is Nov 22, for a typical growing season of 261 days. For a 90% chance that the last frost has passed, wait until Mar 31. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 5Last spring frost (median)50% chance of 32°F after this date
- Mar 31Safer planting date10% chance of 32°F after this date
- Nov 22First fall frost (median)50% chance of 32°F by this date
- 261 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 27 | Mar 20 | Apr 11 |
| 32°F | Feb 13 | Mar 5 | Mar 31 |
| 28°F | Jan 24 | Feb 20 | Mar 12 |
| 24°F | Dec 31 | Feb 3 | Mar 5 |
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 28 | Nov 11 | Dec 1 |
| 32°F | Nov 4 | Nov 22 | Dec 11 |
| 28°F | Nov 14 | Dec 6 | Jan 2 |
| 24°F | Nov 24 | Dec 26 | Jan 31 |
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 | 210 days | 238 days | 264 days |
| 32°F | 233 days | 261 days | 291 days |
| 28°F | 259 days | 292 days | 329 days |
| 24°F | 288 days | 324 days | 364 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 92% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 76530 | 9a | 20 to 25°F | 10 km |
| 76523 | 9a | 20 to 25°F | 10 km |
| 76511 | 9a | 20 to 25°F | 13 km |
| 76577 | 9a | 20 to 25°F | 18 km |
| 76534 | 9a | 20 to 25°F | 19 km |
| 76573 | 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 USC00413686, at 30.7189, -97.3211, elevation 169 m (555 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 25.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Taylor 1nw (17 km)
- Cameron (36 km)
- Georgetown Lake (39 km)
- Elgin 1 N (40 km)
- Stillhouse Hollow Dam (41 km)
- Lexington (46 km)
- Killeen (52 km)
- Austin Great Hills (54 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.