Brownsboro, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 24.6 °C (high). Annual precipitation averages 1138.7 Millimeters. 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 | 1.7 °C | 13.4 °C | 93.47 mm |
| February | 3.7 °C | 15.9 °C | 95.76 mm |
| March | 7.4 °C | 20 °C | 101.85 mm |
| April | 11.3 °C | 24.6 °C | 103.12 mm |
| May | 16.6 °C | 28.4 °C | 112.52 mm |
| June | 20.7 °C | 32.1 °C | 105.66 mm |
| July | 22.2 °C | 34.3 °C | 60.96 mm |
| August | 21.8 °C | 34.8 °C | 62.48 mm |
| September | 18.2 °C | 31.6 °C | 84.07 mm |
| October | 12.3 °C | 25.9 °C | 116.59 mm |
| November | 6.7 °C | 19.5 °C | 92.46 mm |
| December | 2.8 °C | 14.8 °C | 109.73 mm |
| Annual | 12.1 °C | 24.6 °C | 1138.67 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |