Mount Sterling, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.5 °F (low) to 65.3 °F (high). Annual precipitation averages 48.7 Inches. Mount Sterling is located in USDA Plant Hardiness Zone 6b. 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 | 24.1 °F | 41.5 °F | 3.5 in. |
| February | 26.8 °F | 45.6 °F | 3.49 in. |
| March | 33.7 °F | 54.7 °F | 4.32 in. |
| April | 43.4 °F | 66.0 °F | 4.51 in. |
| May | 53.3 °F | 74.7 °F | 5.06 in. |
| June | 61.2 °F | 82.6 °F | 4.92 in. |
| July | 65.3 °F | 85.6 °F | 5.3 in. |
| August | 63.0 °F | 84.9 °F | 3.46 in. |
| September | 56.1 °F | 79.6 °F | 3.83 in. |
| October | 44.2 °F | 67.9 °F | 2.97 in. |
| November | 34.4 °F | 55.4 °F | 3.18 in. |
| December | 28.3 °F | 45.3 °F | 4.12 in. |
| Annual | 44.5 °F | 65.3 °F | 48.66 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |