Brownwood, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.8 °C (low) to 25.8 °C (high). Annual precipitation averages 769.9 Millimeters. 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 | -0.4 °C | 15.2 °C | 42.16 mm |
| February | 2 °C | 17.7 °C | 53.34 mm |
| March | 6.4 °C | 21.5 °C | 59.18 mm |
| April | 10.1 °C | 25.9 °C | 59.44 mm |
| May | 15.8 °C | 29.6 °C | 104.65 mm |
| June | 19.9 °C | 33.4 °C | 100.08 mm |
| July | 21.3 °C | 35.6 °C | 51.82 mm |
| August | 21.2 °C | 35.8 °C | 57.15 mm |
| September | 17.4 °C | 31.9 °C | 72.64 mm |
| October | 10.7 °C | 26.8 °C | 80.01 mm |
| November | 5 °C | 20.4 °C | 50.8 mm |
| December | 0.3 °C | 15.9 °C | 38.61 mm |
| Annual | 10.8 °C | 25.8 °C | 769.88 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |