Frost dates for Brackettville 22 N, TX
At Brackettville 22 N, the median last spring frost (32°F) is Mar 11 and the median first fall frost is Nov 21, for a typical growing season of 255 days. For a 90% chance that the last frost has passed, wait until Apr 3. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 11Last spring frost (median)50% chance of 32°F after this date
- Apr 3Safer planting date10% chance of 32°F after this date
- Nov 21First fall frost (median)50% chance of 32°F by this date
- 255 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 5 | Mar 27 | Apr 15 |
| 32°F | Feb 19 | Mar 11 | Apr 3 |
| 28°F | Jan 31 | Feb 25 | Mar 15 |
| 24°F | Jan 2 | Feb 4 | Mar 4 |
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 26 | Nov 9 | Nov 28 |
| 32°F | Nov 3 | Nov 21 | Dec 8 |
| 28°F | Nov 14 | Dec 3 | Dec 25 |
| 24°F | Nov 25 | Dec 16 | Jan 15 |
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 | 202 days | 229 days | 255 days |
| 32°F | 227 days | 255 days | 282 days |
| 28°F | 252 days | 282 days | 315 days |
| 24°F | 277 days | 315 days | 351 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 96% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78832 | 9a | 20 to 25°F | 23 km |
| 78880 | 8b | 15 to 20°F | 42 km |
| 78843 | 9a | 20 to 25°F | 44 km |
| 78833 | 8b | 15 to 20°F | 47 km |
| 78840 | 8b | 15 to 20°F | 48 km |
| 78828 | 8b | 15 to 20°F | 50 km |
| 78842 | 9a | 20 to 25°F | 54 km |
| 78801 | 9a | 20 to 25°F | 60 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 USC00411013, at 29.6100, -100.4519, elevation 536 m (1,760 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 31.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Carta Valley (29 km)
- Brackettville (33 km)
- Camp Wood (43 km)
- Del Rio 4nw (51 km)
- Rocksprings (52 km)
- Del Rio Intl Airport (53 km)
- Amistad Dam (58 km)
- Prade Rch (72 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.