Roanoke, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 20 °C (high). Annual precipitation averages 1163.6 Millimeters. Roanoke is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 7.9 °C | 88.39 mm |
| February | -1.3 °C | 10.3 °C | 71.12 mm |
| March | 2.2 °C | 14.8 °C | 93.47 mm |
| April | 7.2 °C | 20.7 °C | 90.93 mm |
| May | 12.3 °C | 24.8 °C | 121.41 mm |
| June | 16.9 °C | 28.7 °C | 117.86 mm |
| July | 19.2 °C | 30.7 °C | 101.35 mm |
| August | 18.3 °C | 29.7 °C | 100.33 mm |
| September | 14.8 °C | 26.3 °C | 114.55 mm |
| October | 8.1 °C | 20.8 °C | 94.23 mm |
| November | 2.4 °C | 15.1 °C | 79.5 mm |
| December | -0.8 °C | 9.8 °C | 90.42 mm |
| Annual | 8.1 °C | 20 °C | 1163.56 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |