Fair Oaks, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45 °F (low) to 65.4 °F (high). Annual precipitation averages 43.9 Inches. Fair Oaks is located in USDA Plant Hardiness Zone 7b. 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 | 24.6 °F | 42.6 °F | 2.92 in. |
| February | 26.0 °F | 45.9 °F | 2.62 in. |
| March | 32.8 °F | 54.3 °F | 3.68 in. |
| April | 42.8 °F | 65.9 °F | 3.25 in. |
| May | 52.6 °F | 73.9 °F | 4.39 in. |
| June | 61.6 °F | 82.3 °F | 4.46 in. |
| July | 66.5 °F | 86.7 °F | 4.49 in. |
| August | 64.7 °F | 85.0 °F | 3.48 in. |
| September | 58.0 °F | 78.5 °F | 4.21 in. |
| October | 45.7 °F | 66.9 °F | 3.68 in. |
| November | 35.5 °F | 56.4 °F | 3.11 in. |
| December | 28.7 °F | 46.5 °F | 3.62 in. |
| Annual | 45 °F | 65.4 °F | 43.91 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |