Vienna, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.1 °F (low) to 65.9 °F (high). Annual precipitation averages 44.7 Inches. Vienna is located in USDA Plant Hardiness Zone 7b. 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 | 25.7 °F | 43.0 °F | 3.05 in. |
| February | 27.2 °F | 46.3 °F | 2.67 in. |
| March | 33.9 °F | 54.6 °F | 3.85 in. |
| April | 44.0 °F | 66.5 °F | 3.35 in. |
| May | 53.6 °F | 74.6 °F | 4.43 in. |
| June | 62.5 °F | 82.9 °F | 4.46 in. |
| July | 67.5 °F | 87.3 °F | 4.51 in. |
| August | 65.8 °F | 85.6 °F | 3.51 in. |
| September | 59.2 °F | 79.0 °F | 4.33 in. |
| October | 47.0 °F | 67.4 °F | 3.73 in. |
| November | 36.7 °F | 56.8 °F | 3.19 in. |
| December | 29.9 °F | 47.0 °F | 3.64 in. |
| Annual | 46.1 °F | 65.9 °F | 44.72 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |