Knollwood, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.3 °F (low) to 73.9 °F (high). Annual precipitation averages 43.1 Inches. Knollwood is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.5 °F | 52.8 °F | 2.35 in. |
| February | 36.0 °F | 57.1 °F | 2.63 in. |
| March | 43.4 °F | 65.5 °F | 4.04 in. |
| April | 51.3 °F | 73.0 °F | 3.52 in. |
| May | 60.9 °F | 80.3 °F | 5.36 in. |
| June | 69.6 °F | 88.8 °F | 4.36 in. |
| July | 73.8 °F | 93.7 °F | 2.91 in. |
| August | 73.4 °F | 94.1 °F | 2.84 in. |
| September | 65.9 °F | 86.8 °F | 3.65 in. |
| October | 54.6 °F | 76.0 °F | 4.52 in. |
| November | 43.4 °F | 64.4 °F | 3.43 in. |
| December | 34.8 °F | 54.8 °F | 3.44 in. |
| Annual | 53.3 °F | 73.9 °F | 43.05 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |