Poynor, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.4 °F (low) to 77.2 °F (high). Annual precipitation averages 45.3 Inches. Poynor 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 | 37.2 °F | 58.2 °F | 3.65 in. |
| February | 40.3 °F | 62.1 °F | 3.75 in. |
| March | 47.1 °F | 69.5 °F | 3.82 in. |
| April | 53.5 °F | 76.7 °F | 3.69 in. |
| May | 63.2 °F | 83.8 °F | 4.4 in. |
| June | 70.4 °F | 90.1 °F | 4.4 in. |
| July | 73.2 °F | 93.8 °F | 2.2 in. |
| August | 72.7 °F | 95.0 °F | 2.61 in. |
| September | 66.5 °F | 89.3 °F | 3.77 in. |
| October | 55.8 °F | 79.6 °F | 4.7 in. |
| November | 45.6 °F | 68.1 °F | 4.05 in. |
| December | 38.7 °F | 60.0 °F | 4.3 in. |
| Annual | 55.4 °F | 77.2 °F | 45.34 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |