Willow Park, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 24.6 °C (high). Annual precipitation averages 923.8 Millimeters. Willow Park is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.7 °C | 13.6 °C | 54.1 mm |
| February | 2.8 °C | 15.4 °C | 62.99 mm |
| March | 7.2 °C | 20.2 °C | 82.3 mm |
| April | 11.2 °C | 24.4 °C | 73.41 mm |
| May | 16.7 °C | 28.1 °C | 112.78 mm |
| June | 21 °C | 32.6 °C | 100.84 mm |
| July | 22.9 °C | 35 °C | 52.83 mm |
| August | 22.7 °C | 35.3 °C | 68.07 mm |
| September | 18.6 °C | 31.3 °C | 83.31 mm |
| October | 12.3 °C | 25.5 °C | 103.63 mm |
| November | 6.7 °C | 19.3 °C | 68.07 mm |
| December | 1.9 °C | 14.4 °C | 61.47 mm |
| Annual | 12.1 °C | 24.6 °C | 923.8 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 |