Bastian, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.5 °F (low) to 64.3 °F (high). Annual precipitation averages 42.9 Inches. Bastian is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 42.5 °F | 3.52 in. |
| February | 25.1 °F | 46.1 °F | 3.04 in. |
| March | 31.1 °F | 54.2 °F | 3.89 in. |
| April | 39.7 °F | 65.2 °F | 3.82 in. |
| May | 49.0 °F | 73.3 °F | 4.5 in. |
| June | 57.1 °F | 79.9 °F | 4.22 in. |
| July | 60.9 °F | 83.1 °F | 4.05 in. |
| August | 59.6 °F | 82.1 °F | 3.48 in. |
| September | 53.0 °F | 76.9 °F | 3.5 in. |
| October | 41.3 °F | 66.7 °F | 2.87 in. |
| November | 31.4 °F | 55.6 °F | 2.52 in. |
| December | 26.2 °F | 45.9 °F | 3.5 in. |
| Annual | 41.5 °F | 64.3 °F | 42.91 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |