Falmouth, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.8 °F (low) to 68.2 °F (high). Annual precipitation averages 43.5 Inches. Falmouth 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 | 26.1 °F | 46.1 °F | 3.06 in. |
| February | 27.5 °F | 49.5 °F | 2.58 in. |
| March | 34.2 °F | 57.2 °F | 3.77 in. |
| April | 43.6 °F | 68.5 °F | 3.3 in. |
| May | 53.6 °F | 76.5 °F | 4.06 in. |
| June | 62.6 °F | 84.7 °F | 4.08 in. |
| July | 67.3 °F | 89.1 °F | 4.55 in. |
| August | 65.0 °F | 87.1 °F | 3.59 in. |
| September | 58.5 °F | 80.6 °F | 4.33 in. |
| October | 46.0 °F | 70.0 °F | 3.56 in. |
| November | 35.6 °F | 59.1 °F | 3.21 in. |
| December | 29.4 °F | 49.6 °F | 3.44 in. |
| Annual | 45.8 °F | 68.2 °F | 43.53 in. |
| 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 : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |