Lancaster, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.3 °C (low) to 20.5 °C (high). Annual precipitation averages 1226.3 Millimeters. Lancaster is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °C | 8.9 °C | 86.36 mm |
| February | -1.1 °C | 10.5 °C | 70.61 mm |
| March | 2.6 °C | 14.7 °C | 108.97 mm |
| April | 8.1 °C | 20.3 °C | 87.38 mm |
| May | 13.4 °C | 24.6 °C | 97.28 mm |
| June | 18.3 °C | 29 °C | 112.27 mm |
| July | 20.8 °C | 31.4 °C | 128.02 mm |
| August | 19.9 °C | 30.2 °C | 131.06 mm |
| September | 16.6 °C | 27.2 °C | 127.51 mm |
| October | 10 °C | 21.7 °C | 105.92 mm |
| November | 4.3 °C | 15.9 °C | 77.22 mm |
| December | 0.4 °C | 11.1 °C | 93.73 mm |
| Annual | 9.3 °C | 20.5 °C | 1226.33 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |