Cape Charles, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.5 °C (low) to 19.8 °C (high). Annual precipitation averages 1156 Millimeters. Cape Charles is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.6 °C | 8.7 °C | 83.06 mm |
| February | 1.1 °C | 9.9 °C | 70.61 mm |
| March | 4.2 °C | 13.1 °C | 98.81 mm |
| April | 9.6 °C | 19.3 °C | 83.57 mm |
| May | 14.9 °C | 23.6 °C | 84.58 mm |
| June | 19.9 °C | 28.4 °C | 97.28 mm |
| July | 22.6 °C | 30.6 °C | 115.06 mm |
| August | 21.9 °C | 29.3 °C | 128.52 mm |
| September | 19.4 °C | 26.7 °C | 118.62 mm |
| October | 13.3 °C | 21.2 °C | 94.74 mm |
| November | 7.3 °C | 15.6 °C | 86.61 mm |
| December | 3.2 °C | 11.2 °C | 94.49 mm |
| Annual | 11.5 °C | 19.8 °C | 1155.95 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |