Thrall, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 26.1 °C (high). Annual precipitation averages 924.6 Millimeters. Thrall is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.2 °C | 15.9 °C | 71.88 mm |
| February | 5.3 °C | 18 °C | 56.9 mm |
| March | 9 °C | 21.9 °C | 78.74 mm |
| April | 12.8 °C | 25.8 °C | 65.53 mm |
| May | 17.8 °C | 29.6 °C | 118.87 mm |
| June | 21.6 °C | 33.2 °C | 82.3 mm |
| July | 22.8 °C | 35.2 °C | 54.86 mm |
| August | 22.6 °C | 35.7 °C | 65.28 mm |
| September | 19.5 °C | 32.5 °C | 75.18 mm |
| October | 13.8 °C | 27.4 °C | 101.09 mm |
| November | 8.2 °C | 21.3 °C | 77.22 mm |
| December | 4.2 °C | 16.7 °C | 76.71 mm |
| Annual | 13.4 °C | 26.1 °C | 924.56 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |