Gloucester Courthouse, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 20.5 °C (high). Annual precipitation averages 1277.6 Millimeters. Gloucester Courthouse is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.9 °C | 9.2 °C | 89.66 mm |
| February | -0.3 °C | 10.8 °C | 74.93 mm |
| March | 3.3 °C | 14.7 °C | 106.17 mm |
| April | 8.7 °C | 20.5 °C | 95.25 mm |
| May | 14.2 °C | 24.4 °C | 100.33 mm |
| June | 19 °C | 28.7 °C | 108.46 mm |
| July | 21.3 °C | 31.3 °C | 139.7 mm |
| August | 20.7 °C | 30.2 °C | 146.56 mm |
| September | 17.3 °C | 27.2 °C | 133.1 mm |
| October | 10.7 °C | 21.7 °C | 111.51 mm |
| November | 4.9 °C | 16 °C | 78.74 mm |
| December | 1 °C | 11.3 °C | 93.22 mm |
| Annual | 10 °C | 20.5 °C | 1277.63 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |