Penhook, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 67.6 °F (high). Annual precipitation averages 45.9 Inches. Penhook is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.4 °F | 46.5 °F | 3.66 in. |
| February | 28.2 °F | 50.2 °F | 2.9 in. |
| March | 34.7 °F | 58.5 °F | 3.94 in. |
| April | 43.9 °F | 68.9 °F | 3.81 in. |
| May | 53.3 °F | 76.1 °F | 4.35 in. |
| June | 61.5 °F | 83.0 °F | 4.37 in. |
| July | 66.0 °F | 86.5 °F | 4.06 in. |
| August | 64.5 °F | 84.9 °F | 3.59 in. |
| September | 57.7 °F | 78.8 °F | 4.64 in. |
| October | 45.7 °F | 69.2 °F | 3.51 in. |
| November | 35.0 °F | 59.2 °F | 3.39 in. |
| December | 29.4 °F | 49.7 °F | 3.69 in. |
| Annual | 45.5 °F | 67.6 °F | 45.91 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |