Deerfield, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.2 °C (low) to 17.8 °C (high). Annual precipitation averages 1124.5 Millimeters. Deerfield is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.5 °C | 5.5 °C | 84.07 mm |
| February | -4.2 °C | 7.6 °C | 71.12 mm |
| March | -0.9 °C | 11.9 °C | 97.03 mm |
| April | 4.2 °C | 18.2 °C | 99.31 mm |
| May | 9.5 °C | 22.6 °C | 116.59 mm |
| June | 14.1 °C | 26.7 °C | 118.36 mm |
| July | 16.3 °C | 28.7 °C | 101.35 mm |
| August | 15.6 °C | 28.1 °C | 92.71 mm |
| September | 11.7 °C | 24.8 °C | 100.33 mm |
| October | 5.3 °C | 18.9 °C | 78.74 mm |
| November | -0.2 °C | 12.7 °C | 76.96 mm |
| December | -3.6 °C | 7.5 °C | 87.88 mm |
| Annual | 5.2 °C | 17.8 °C | 1124.45 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |