Post Oak Bend City, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.3 °F (low) to 76.2 °F (high). Annual precipitation averages 41.4 Inches. Post Oak Bend City 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 | 34.5 °F | 56.0 °F | 3.03 in. |
| February | 38.3 °F | 60.1 °F | 3.14 in. |
| March | 45.5 °F | 67.5 °F | 3.82 in. |
| April | 52.7 °F | 75.1 °F | 3.51 in. |
| May | 62.6 °F | 82.5 °F | 4.72 in. |
| June | 70.3 °F | 90.6 °F | 3.76 in. |
| July | 73.3 °F | 94.6 °F | 1.94 in. |
| August | 72.8 °F | 95.5 °F | 2.59 in. |
| September | 66.0 °F | 89.0 °F | 2.89 in. |
| October | 54.6 °F | 78.6 °F | 5.0 in. |
| November | 44.4 °F | 66.9 °F | 3.35 in. |
| December | 36.4 °F | 58.0 °F | 3.69 in. |
| Annual | 54.3 °F | 76.2 °F | 41.44 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 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |