Quinby, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 19.6 °C (high). Annual precipitation averages 1174.8 Millimeters. Quinby is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 8.6 °C | 89.41 mm |
| February | 0.2 °C | 9.7 °C | 74.68 mm |
| March | 3.5 °C | 13.1 °C | 102.62 mm |
| April | 8.7 °C | 18.8 °C | 83.82 mm |
| May | 14.1 °C | 23.4 °C | 91.44 mm |
| June | 19 °C | 28.1 °C | 104.39 mm |
| July | 21.8 °C | 30.5 °C | 120.14 mm |
| August | 20.8 °C | 29.3 °C | 116.84 mm |
| September | 17.8 °C | 26.6 °C | 112.52 mm |
| October | 11.8 °C | 21.2 °C | 101.35 mm |
| November | 5.8 °C | 15.4 °C | 79.5 mm |
| December | 2.1 °C | 10.9 °C | 98.04 mm |
| Annual | 10.4 °C | 19.6 °C | 1174.75 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |