Altavista, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.4 °C (low) to 20.5 °C (high). Annual precipitation averages 1133.3 Millimeters. Altavista 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 | -3.3 °C | 8.7 °C | 89.41 mm |
| February | -2.4 °C | 10.7 °C | 68.58 mm |
| March | 1.1 °C | 15.3 °C | 95.25 mm |
| April | 6.4 °C | 21.1 °C | 91.69 mm |
| May | 11.7 °C | 25 °C | 107.7 mm |
| June | 16.6 °C | 29.2 °C | 102.87 mm |
| July | 19.1 °C | 31.2 °C | 102.36 mm |
| August | 18.1 °C | 30.3 °C | 88.39 mm |
| September | 14.4 °C | 26.9 °C | 113.79 mm |
| October | 7.2 °C | 21.3 °C | 89.41 mm |
| November | 1.2 °C | 15.6 °C | 90.93 mm |
| December | -1.7 °C | 10.4 °C | 92.96 mm |
| Annual | 7.4 °C | 20.5 °C | 1133.34 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |