Mount Jackson, Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 18.6 °C (high). Annual precipitation averages 962.9 Millimeters. Mount Jackson 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 | -5.6 °C | 5.9 °C | 66.55 mm |
| February | -4.6 °C | 7.7 °C | 52.58 mm |
| March | -0.9 °C | 12.3 °C | 75.95 mm |
| April | 4.4 °C | 18.9 °C | 75.18 mm |
| May | 9.8 °C | 23.6 °C | 102.11 mm |
| June | 14.9 °C | 28.1 °C | 103.38 mm |
| July | 17.2 °C | 30.2 °C | 95 mm |
| August | 16.1 °C | 29.3 °C | 93.98 mm |
| September | 12.1 °C | 25.9 °C | 100.08 mm |
| October | 5.6 °C | 19.9 °C | 64.52 mm |
| November | 0.1 °C | 13.5 °C | 62.99 mm |
| December | -3.4 °C | 8.2 °C | 70.61 mm |
| Annual | 5.5 °C | 18.6 °C | 962.93 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |