Duffield, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.9 °C (low) to 19.9 °C (high). Annual precipitation averages 1289.6 Millimeters. Duffield is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.7 °C | 7.7 °C | 111 mm |
| February | -2.3 °C | 9.9 °C | 110.49 mm |
| March | 1.2 °C | 14.9 °C | 124.46 mm |
| April | 5.9 °C | 20.6 °C | 117.6 mm |
| May | 11.2 °C | 24.8 °C | 103.89 mm |
| June | 15.8 °C | 28.4 °C | 118.11 mm |
| July | 18.1 °C | 29.8 °C | 134.87 mm |
| August | 17.4 °C | 29.6 °C | 99.57 mm |
| September | 13.7 °C | 26.9 °C | 86.87 mm |
| October | 6.8 °C | 21.4 °C | 70.61 mm |
| November | 0.8 °C | 14.9 °C | 87.88 mm |
| December | -1.8 °C | 9.5 °C | 124.21 mm |
| Annual | 6.9 °C | 19.9 °C | 1289.56 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |