Brownsboro, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.8 °F (low) to 76.3 °F (high). Annual precipitation averages 44.8 Inches. Brownsboro 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 | 35.0 °F | 56.1 °F | 3.68 in. |
| February | 38.6 °F | 60.7 °F | 3.77 in. |
| March | 45.4 °F | 68.0 °F | 4.01 in. |
| April | 52.4 °F | 76.3 °F | 4.06 in. |
| May | 61.9 °F | 83.2 °F | 4.43 in. |
| June | 69.2 °F | 89.8 °F | 4.16 in. |
| July | 72.0 °F | 93.7 °F | 2.4 in. |
| August | 71.2 °F | 94.7 °F | 2.46 in. |
| September | 64.8 °F | 88.9 °F | 3.31 in. |
| October | 54.1 °F | 78.7 °F | 4.59 in. |
| November | 44.0 °F | 67.1 °F | 3.64 in. |
| December | 37.0 °F | 58.6 °F | 4.32 in. |
| Annual | 53.8 °F | 76.3 °F | 44.83 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |