Iron Gate, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.5 °C (low) to 19.6 °C (high). Annual precipitation averages 1037.1 Millimeters. Iron Gate is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.1 °C | 7 °C | 78.49 mm |
| February | -3.1 °C | 9.4 °C | 69.34 mm |
| March | 0.3 °C | 14.2 °C | 90.68 mm |
| April | 5.4 °C | 20.6 °C | 92.71 mm |
| May | 10.7 °C | 24.8 °C | 102.11 mm |
| June | 15.4 °C | 28.6 °C | 108.97 mm |
| July | 17.6 °C | 30.6 °C | 91.44 mm |
| August | 17 °C | 29.7 °C | 80.26 mm |
| September | 13.3 °C | 26.3 °C | 88.14 mm |
| October | 6.6 °C | 20.7 °C | 75.95 mm |
| November | 0.7 °C | 14.6 °C | 74.68 mm |
| December | -2.3 °C | 9.2 °C | 84.33 mm |
| Annual | 6.5 °C | 19.6 °C | 1037.1 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°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 |