Brownwood, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.4 °F (low) to 78.5 °F (high). Annual precipitation averages 30.3 Inches. Brownwood 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 | 31.2 °F | 59.4 °F | 1.66 in. |
| February | 35.6 °F | 63.8 °F | 2.1 in. |
| March | 43.5 °F | 70.7 °F | 2.33 in. |
| April | 50.1 °F | 78.7 °F | 2.34 in. |
| May | 60.4 °F | 85.3 °F | 4.12 in. |
| June | 67.8 °F | 92.2 °F | 3.94 in. |
| July | 70.3 °F | 96.1 °F | 2.04 in. |
| August | 70.1 °F | 96.4 °F | 2.25 in. |
| September | 63.3 °F | 89.5 °F | 2.86 in. |
| October | 51.3 °F | 80.3 °F | 3.15 in. |
| November | 41.0 °F | 68.8 °F | 2.0 in. |
| December | 32.6 °F | 60.6 °F | 1.52 in. |
| Annual | 51.4 °F | 78.5 °F | 30.31 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |