Summersville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.3 °F (low) to 67.1 °F (high). Annual precipitation averages 54.2 Inches. Summersville 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 | 25.8 °F | 43.7 °F | 4.07 in. |
| February | 28.8 °F | 48.3 °F | 4.27 in. |
| March | 35.4 °F | 57.2 °F | 5.14 in. |
| April | 45.2 °F | 67.7 °F | 4.84 in. |
| May | 55.3 °F | 75.9 °F | 5.59 in. |
| June | 63.1 °F | 84.2 °F | 5.03 in. |
| July | 66.7 °F | 86.9 °F | 5.18 in. |
| August | 65.0 °F | 86.0 °F | 3.91 in. |
| September | 58.1 °F | 80.8 °F | 4.11 in. |
| October | 46.6 °F | 70.4 °F | 3.56 in. |
| November | 36.0 °F | 57.3 °F | 3.73 in. |
| December | 30.0 °F | 47.3 °F | 4.74 in. |
| Annual | 46.3 °F | 67.1 °F | 54.17 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |