Williamsburg, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.5 °F (low) to 68 °F (high). Annual precipitation averages 53.4 Inches. Williamsburg is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.2 °F | 45.7 °F | 4.47 in. |
| February | 27.8 °F | 49.9 °F | 4.27 in. |
| March | 33.7 °F | 59.0 °F | 5.25 in. |
| April | 42.3 °F | 69.8 °F | 4.75 in. |
| May | 52.9 °F | 77.4 °F | 4.67 in. |
| June | 60.9 °F | 84.4 °F | 4.67 in. |
| July | 65.0 °F | 86.4 °F | 5.39 in. |
| August | 63.3 °F | 85.3 °F | 4.48 in. |
| September | 56.6 °F | 79.9 °F | 3.85 in. |
| October | 44.1 °F | 69.6 °F | 3.15 in. |
| November | 33.6 °F | 58.5 °F | 3.25 in. |
| December | 29.1 °F | 49.5 °F | 5.15 in. |
| Annual | 44.5 °F | 68 °F | 53.35 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 |