San Augustine, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.2 °F (low) to 77.6 °F (high). Annual precipitation averages 55 Inches. San Augustine is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.0 °F | 59.3 °F | 4.94 in. |
| February | 39.4 °F | 63.3 °F | 4.74 in. |
| March | 45.9 °F | 70.3 °F | 5.02 in. |
| April | 52.7 °F | 76.9 °F | 4.47 in. |
| May | 62.3 °F | 84.2 °F | 4.49 in. |
| June | 69.4 °F | 90.3 °F | 4.84 in. |
| July | 71.9 °F | 93.1 °F | 3.26 in. |
| August | 71.3 °F | 94.3 °F | 4.63 in. |
| September | 65.4 °F | 89.1 °F | 3.81 in. |
| October | 53.8 °F | 79.8 °F | 4.56 in. |
| November | 44.3 °F | 69.0 °F | 4.67 in. |
| December | 37.5 °F | 61.0 °F | 5.59 in. |
| Annual | 54.2 °F | 77.6 °F | 55.02 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |