Fairlawn, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.8 °C (low) to 18.3 °C (high). Annual precipitation averages 1004.3 Millimeters. Fairlawn 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 | -4.6 °C | 6.1 °C | 78.99 mm |
| February | -3.3 °C | 8.1 °C | 64.77 mm |
| March | 0.1 °C | 12.7 °C | 85.6 mm |
| April | 4.8 °C | 18.7 °C | 88.9 mm |
| May | 10.1 °C | 23.2 °C | 103.63 mm |
| June | 14.5 °C | 27.1 °C | 97.28 mm |
| July | 16.7 °C | 28.9 °C | 98.3 mm |
| August | 16.1 °C | 28.3 °C | 82.8 mm |
| September | 12.3 °C | 25.3 °C | 82.04 mm |
| October | 5.7 °C | 19.6 °C | 71.12 mm |
| November | 0.2 °C | 13.3 °C | 69.34 mm |
| December | -2.8 °C | 7.9 °C | 81.53 mm |
| Annual | 5.8 °C | 18.3 °C | 1004.3 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |