Post Oak Bend City, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.4 °C (low) to 24.6 °C (high). Annual precipitation averages 1052.6 Millimeters. 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 | 1.4 °C | 13.3 °C | 76.96 mm |
| February | 3.5 °C | 15.6 °C | 79.76 mm |
| March | 7.5 °C | 19.7 °C | 97.03 mm |
| April | 11.5 °C | 23.9 °C | 89.15 mm |
| May | 17 °C | 28.1 °C | 119.89 mm |
| June | 21.3 °C | 32.6 °C | 95.5 mm |
| July | 22.9 °C | 34.8 °C | 49.28 mm |
| August | 22.7 °C | 35.3 °C | 65.79 mm |
| September | 18.9 °C | 31.7 °C | 73.41 mm |
| October | 12.6 °C | 25.9 °C | 127 mm |
| November | 6.9 °C | 19.4 °C | 85.09 mm |
| December | 2.4 °C | 14.4 °C | 93.73 mm |
| Annual | 12.4 °C | 24.6 °C | 1052.59 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |