Windthorst, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 24.6 °C (high). Annual precipitation averages 794.3 Millimeters. Windthorst 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 | -0.7 °C | 12.9 °C | 37.85 mm |
| February | 1.1 °C | 15.2 °C | 48.51 mm |
| March | 5.6 °C | 19.9 °C | 61.47 mm |
| April | 9.9 °C | 24.6 °C | 68.33 mm |
| May | 15.7 °C | 28.7 °C | 106.68 mm |
| June | 20.5 °C | 33.1 °C | 94.74 mm |
| July | 22.6 °C | 35.9 °C | 56.9 mm |
| August | 22.1 °C | 35.8 °C | 59.94 mm |
| September | 17.7 °C | 31.5 °C | 74.68 mm |
| October | 11.3 °C | 25.7 °C | 86.36 mm |
| November | 5.1 °C | 18.8 °C | 53.09 mm |
| December | 0.3 °C | 13.6 °C | 45.72 mm |
| Annual | 10.9 °C | 24.6 °C | 794.27 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |