Brookshire, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58.5 °F (low) to 79.6 °F (high). Annual precipitation averages 49.2 Inches. Brookshire is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.8 °F | 62.5 °F | 3.76 in. |
| February | 45.4 °F | 66.2 °F | 2.91 in. |
| March | 51.7 °F | 72.8 °F | 3.56 in. |
| April | 58.0 °F | 79.3 °F | 3.91 in. |
| May | 66.3 °F | 85.9 °F | 4.86 in. |
| June | 72.0 °F | 91.1 °F | 4.87 in. |
| July | 73.4 °F | 93.4 °F | 3.28 in. |
| August | 73.1 °F | 95.1 °F | 4.65 in. |
| September | 68.8 °F | 90.0 °F | 4.57 in. |
| October | 58.9 °F | 82.2 °F | 4.56 in. |
| November | 49.6 °F | 72.1 °F | 4.33 in. |
| December | 43.2 °F | 64.5 °F | 3.89 in. |
| Annual | 58.5 °F | 79.6 °F | 49.15 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |