Yorktown, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.9 °C (low) to 27.5 °C (high). Annual precipitation averages 860.8 Millimeters. Yorktown 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 | 5.6 °C | 18.2 °C | 54.36 mm |
| February | 7.7 °C | 20.3 °C | 41.66 mm |
| March | 11.3 °C | 23.7 °C | 68.33 mm |
| April | 14.7 °C | 27.2 °C | 70.36 mm |
| May | 19.2 °C | 30.7 °C | 97.28 mm |
| June | 22.2 °C | 33.7 °C | 89.15 mm |
| July | 23 °C | 35.2 °C | 66.04 mm |
| August | 22.8 °C | 35.9 °C | 61.21 mm |
| September | 20.4 °C | 33.1 °C | 105.92 mm |
| October | 15.4 °C | 29.2 °C | 86.11 mm |
| November | 10.3 °C | 23.4 °C | 63.5 mm |
| December | 6.6 °C | 19.2 °C | 56.9 mm |
| Annual | 14.9 °C | 27.5 °C | 860.82 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |