Frost dates for Stillhouse Hollow Dam, TX
At Stillhouse Hollow Dam, the median last spring frost (32°F) is Mar 14 and the median first fall frost is Nov 20, for a typical growing season of 251 days. For a 90% chance that the last frost has passed, wait until Apr 4. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 14Last spring frost (median)50% chance of 32°F after this date
- Apr 4Safer planting date10% chance of 32°F after this date
- Nov 20First fall frost (median)50% chance of 32°F by this date
- 251 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 7 | Mar 27 | Apr 19 |
| 32°F | Feb 22 | Mar 14 | Apr 4 |
| 28°F | Jan 31 | Mar 1 | Mar 21 |
| 24°F | Jan 9 | Feb 12 | Mar 10 |
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 21 | Nov 8 | Nov 28 |
| 32°F | Oct 29 | Nov 20 | Dec 9 |
| 28°F | Nov 10 | Dec 1 | Dec 28 |
| 24°F | Nov 23 | Dec 21 | Jan 24 |
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 | 197 days | 226 days | 251 days |
| 32°F | 218 days | 251 days | 276 days |
| 28°F | 247 days | 277 days | 311 days |
| 24°F | 274 days | 309 days | 349 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 95% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 76513 | 8b | 15 to 20°F | 3 km |
| 76571 | 8b | 15 to 20°F | 12 km |
| 76502 | 8b | 15 to 20°F | 13 km |
| 76554 | 9a | 20 to 25°F | 16 km |
| 76504 | 8b | 15 to 20°F | 19 km |
| 76501 | 9a | 20 to 25°F | 27 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 USC00418646, at 31.0372, -97.5283, elevation 215 m (706 ft).
- Data quality: Representative (10+ years), 24 years of freeze data.
- Average days per year at or below 32°F: 33.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Killeen (16 km)
- Granger Dam (41 km)
- Georgetown Lake (44 km)
- Gatesville (45 km)
- McGregor (46 km)
- Taylor 1nw (51 km)
- Cameron (57 km)
- Lampasas (63 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.