Garwood, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15 °C (low) to 26.8 °C (high). Annual precipitation averages 1128.5 Millimeters. Garwood is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.8 °C | 17.3 °C | 86.11 mm |
| February | 7.8 °C | 19.3 °C | 65.79 mm |
| March | 11.3 °C | 22.9 °C | 82.3 mm |
| April | 14.7 °C | 26.6 °C | 85.34 mm |
| May | 19.1 °C | 30.1 °C | 116.08 mm |
| June | 22.3 °C | 32.9 °C | 118.11 mm |
| July | 23.1 °C | 34.2 °C | 79.5 mm |
| August | 23.1 °C | 35.4 °C | 96.77 mm |
| September | 20.7 °C | 32.6 °C | 106.68 mm |
| October | 15.3 °C | 28.3 °C | 108.97 mm |
| November | 10.2 °C | 22.8 °C | 98.55 mm |
| December | 6.7 °C | 18.6 °C | 84.33 mm |
| Annual | 15 °C | 26.8 °C | 1128.53 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |