| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 35a - Tertiary Uplands |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 75972 - San Augustine, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 36 | 38 | 46 | 54 | 62 | 69 | 72 | 70 | 65 | 54 | 44 | 38 | 54 |
| Avg Max Temp (°F) | 58 | 63 | 70 | 77 | 84 | 90 | 93 | 94 | 88 | 80 | 68 | 60 | 77 |
| Avg Precip (In.) | 5.16 | 4.13 | 4.32 | 3.97 | 5.13 | 4.71 | 3.29 | 3.4 | 4.06 | 4.18 | 4.61 | 5.23 | 52.17 |