Phenix, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20.4 °C (high). Annual precipitation averages 1179.1 Millimeters. Phenix 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 | 8.7 °C | 90.42 mm |
| February | -2.2 °C | 10.7 °C | 70.36 mm |
| March | 1.3 °C | 15.1 °C | 104.65 mm |
| April | 6.7 °C | 21 °C | 91.95 mm |
| May | 12.1 °C | 25 °C | 112.78 mm |
| June | 16.9 °C | 29.2 °C | 108.46 mm |
| July | 19.3 °C | 31.3 °C | 105.41 mm |
| August | 18.4 °C | 30.3 °C | 96.27 mm |
| September | 14.7 °C | 26.9 °C | 122.68 mm |
| October | 7.6 °C | 21.2 °C | 96.52 mm |
| November | 1.7 °C | 15.4 °C | 86.87 mm |
| December | -1.3 °C | 10.5 °C | 92.71 mm |
| Annual | 7.7 °C | 20.4 °C | 1179.08 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 |