Melfa, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 19.7 °C (high). Annual precipitation averages 1194.3 Millimeters. Melfa 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 | -0.8 °C | 8.7 °C | 88.14 mm |
| February | -0.2 °C | 9.8 °C | 76.71 mm |
| March | 3.2 °C | 13.3 °C | 102.62 mm |
| April | 8.5 °C | 18.8 °C | 86.36 mm |
| May | 13.8 °C | 23.6 °C | 91.95 mm |
| June | 18.8 °C | 28.2 °C | 105.41 mm |
| July | 21.5 °C | 30.6 °C | 119.38 mm |
| August | 20.4 °C | 29.4 °C | 117.6 mm |
| September | 17.3 °C | 26.5 °C | 105.66 mm |
| October | 11.2 °C | 21.2 °C | 113.28 mm |
| November | 5.3 °C | 15.4 °C | 88.14 mm |
| December | 1.5 °C | 11.1 °C | 99.06 mm |
| Annual | 10 °C | 19.7 °C | 1194.31 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |