Passapatanzy, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20 °C (high). Annual precipitation averages 1117.1 Millimeters. Passapatanzy 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 | -3.2 °C | 7.7 °C | 78.74 mm |
| February | -2.4 °C | 9.6 °C | 67.56 mm |
| March | 1.2 °C | 14.1 °C | 97.03 mm |
| April | 6.6 °C | 19.7 °C | 84.07 mm |
| May | 12 °C | 24.7 °C | 103.12 mm |
| June | 16.9 °C | 29.1 °C | 104.9 mm |
| July | 19.4 °C | 31.6 °C | 112.52 mm |
| August | 18.3 °C | 30.4 °C | 95.76 mm |
| September | 14.8 °C | 26.8 °C | 110.24 mm |
| October | 8.1 °C | 21 °C | 90.93 mm |
| November | 2.2 °C | 15.1 °C | 82.55 mm |
| December | -1.4 °C | 9.7 °C | 89.66 mm |
| Annual | 7.7 °C | 20 °C | 1117.08 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |