Fairfield, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.4 °F (low) to 64.2 °F (high). Annual precipitation averages 46.1 Inches. Fairfield 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 | 24.4 °F | 42.2 °F | 3.54 in. |
| February | 26.2 °F | 46.0 °F | 2.84 in. |
| March | 32.4 °F | 53.7 °F | 3.84 in. |
| April | 42.3 °F | 64.9 °F | 4.03 in. |
| May | 51.3 °F | 72.5 °F | 4.31 in. |
| June | 59.2 °F | 80.4 °F | 4.6 in. |
| July | 63.1 °F | 84.0 °F | 4.11 in. |
| August | 61.5 °F | 82.5 °F | 3.46 in. |
| September | 55.0 °F | 76.6 °F | 4.51 in. |
| October | 43.8 °F | 66.3 °F | 3.54 in. |
| November | 33.8 °F | 55.0 °F | 3.67 in. |
| December | 27.8 °F | 45.8 °F | 3.69 in. |
| Annual | 43.4 °F | 64.2 °F | 46.14 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |