Hanover, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.4 °C (low) to 20.6 °C (high). Annual precipitation averages 1163.1 Millimeters. Hanover 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 | 8.7 °C | 84.33 mm |
| February | -1.7 °C | 10.6 °C | 71.37 mm |
| March | 1.9 °C | 14.9 °C | 99.57 mm |
| April | 7.2 °C | 21.2 °C | 86.11 mm |
| May | 12.6 °C | 25.2 °C | 105.66 mm |
| June | 17.5 °C | 29.4 °C | 108.97 mm |
| July | 20.2 °C | 31.6 °C | 111.76 mm |
| August | 18.7 °C | 30.6 °C | 112.52 mm |
| September | 15.6 °C | 27.3 °C | 112.01 mm |
| October | 8.8 °C | 21.6 °C | 94.49 mm |
| November | 2.8 °C | 15.7 °C | 83.31 mm |
| December | -0.8 °C | 10.6 °C | 92.96 mm |
| Annual | 8.4 °C | 20.6 °C | 1163.06 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 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |