Frost dates for San Augustine, TX
At San Augustine, the median last spring frost (32°F) is Mar 18 and the median first fall frost is Nov 13, for a typical growing season of 240 days. For a 90% chance that the last frost has passed, wait until Apr 8. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 18Last spring frost (median)50% chance of 32°F after this date
- Apr 8Safer planting date10% chance of 32°F after this date
- Nov 13First fall frost (median)50% chance of 32°F by this date
- 240 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 12 | Apr 2 | Apr 21 |
| 32°F | Feb 26 | Mar 18 | Apr 8 |
| 28°F | Feb 4 | Mar 4 | Mar 29 |
| 24°F | Jan 14 | Feb 14 | Mar 13 |
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 2 | Nov 18 |
| 32°F | Oct 29 | Nov 13 | Dec 2 |
| 28°F | Nov 4 | Nov 25 | Dec 15 |
| 24°F | Nov 13 | Dec 9 | Jan 7 |
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 | 192 days | 215 days | 241 days |
| 32°F | 214 days | 240 days | 268 days |
| 28°F | 235 days | 267 days | 303 days |
| 24°F | 262 days | 301 days | 340 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 75972 | 8b | 15 to 20°F | 2 km |
| 75930 | 9a | 20 to 25°F | 21 km |
| 75959 | 9a | 20 to 25°F | 27 km |
| 75937 | 8b | 15 to 20°F | 27 km |
| 75944 | 9a | 20 to 25°F | 31 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 USC00417951, at 31.5192, -94.1186, elevation 90 m (295 ft).
- Data quality: Representative (10+ years), 11 years of freeze data.
- Average days per year at or below 32°F: 37.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Center (32 km)
- Nacogdoches (51 km)
- Sam Rayburn Dam (51 km)
- Toledo Bend Dam (65 km)
- Lufkin Angelina Co Airport (68 km)
- Lufkin 11 NW (74 km)
- Carthage (74 km)
- Town Bluff Dam (81 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.