Westbrook, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.3 °F (low) to 77.5 °F (high). Annual precipitation averages 20.1 Inches. Westbrook is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.7 °F | 57.6 °F | 0.78 in. |
| February | 34.1 °F | 62.1 °F | 0.9 in. |
| March | 42.1 °F | 70.4 °F | 1.3 in. |
| April | 50.5 °F | 78.9 °F | 1.5 in. |
| May | 60.3 °F | 86.9 °F | 2.56 in. |
| June | 67.9 °F | 92.4 °F | 2.54 in. |
| July | 71.5 °F | 95.5 °F | 1.68 in. |
| August | 70.9 °F | 94.6 °F | 2.01 in. |
| September | 63.5 °F | 87.3 °F | 2.95 in. |
| October | 52.3 °F | 78.4 °F | 1.83 in. |
| November | 40.1 °F | 66.7 °F | 1.17 in. |
| December | 32.0 °F | 58.8 °F | 0.86 in. |
| Annual | 51.3 °F | 77.5 °F | 20.08 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |