Post, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.8 °F (low) to 76.3 °F (high). Annual precipitation averages 22.3 Inches. Post is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.6 °F | 56.6 °F | 0.74 in. |
| February | 32.5 °F | 60.5 °F | 0.97 in. |
| March | 40.2 °F | 68.7 °F | 1.11 in. |
| April | 47.8 °F | 77.5 °F | 1.75 in. |
| May | 57.9 °F | 84.9 °F | 3.14 in. |
| June | 66.6 °F | 92.2 °F | 3.11 in. |
| July | 70.3 °F | 94.5 °F | 2.39 in. |
| August | 69.3 °F | 94.1 °F | 2.3 in. |
| September | 62.0 °F | 86.4 °F | 2.69 in. |
| October | 50.8 °F | 77.1 °F | 1.75 in. |
| November | 39.2 °F | 65.7 °F | 1.32 in. |
| December | 31.0 °F | 56.9 °F | 1.02 in. |
| Annual | 49.8 °F | 76.3 °F | 22.29 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |