Tappahannock, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 20.7 °C (high). Annual precipitation averages 1170.9 Millimeters. Tappahannock 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 | -1.8 °C | 8.8 °C | 80.77 mm |
| February | -1.1 °C | 10.4 °C | 69.34 mm |
| March | 2.6 °C | 14.9 °C | 97.79 mm |
| April | 7.9 °C | 21 °C | 84.07 mm |
| May | 13.2 °C | 25.1 °C | 102.36 mm |
| June | 18.1 °C | 29.4 °C | 111.51 mm |
| July | 20.6 °C | 31.7 °C | 119.13 mm |
| August | 19.4 °C | 30.6 °C | 120.65 mm |
| September | 16.1 °C | 27.6 °C | 110.74 mm |
| October | 9.6 °C | 21.9 °C | 102.11 mm |
| November | 3.8 °C | 16 °C | 82.3 mm |
| December | 0.3 °C | 10.8 °C | 90.17 mm |
| Annual | 9.1 °C | 20.7 °C | 1170.94 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°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 |